31310003212020 has 144 divisors (see below), whose sum is σ = 102362036671440. Its totient is φ = 7700846542848.

The previous prime is 31310003212009. The next prime is 31310003212031. The reversal of 31310003212020 is 2021230001313.

31310003212020 is a `hidden beast` number, since 31 + 310 + 0 + 0 + 321 + 2 + 0 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (31310003212009) and next prime (31310003212031).

It can be written as a sum of positive squares in 8 ways, for example, as 5847826659984 + 25462176552036 = 2418228^2 + 5046006^2 .

It is a super-2 number, since 2×31310003212020² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31310003211984 and 31310003212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2513805 + ... + 8302964.

It is an arithmetic number, because the mean of its divisors is an integer number (710847476885).

Almost surely, 2^{31310003212020} is an apocalyptic number.

31310003212020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31310003212020 is an abundant number, since it is smaller than the sum of its proper divisors (71052033459420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31310003212020 is a wasteful number, since it uses less digits than its factorization.

31310003212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10818034 (or 10818029 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31310003212020 its reverse (2021230001313), we get a palindrome (33331233213333).

The spelling of 31310003212020 in words is "thirty-one trillion, three hundred ten billion, three million, two hundred twelve thousand, twenty".