31020122012220 has 96 divisors (see below), whose sum is σ = 105280414122240. Its totient is φ = 7520029577280.

The previous prime is 31020122012207. The next prime is 31020122012221. The reversal of 31020122012220 is 2221022102013.

31020122012220 is a `hidden beast` number, since 3 + 10 + 201 + 220 + 12 + 220 = 666.

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 = 31020122012193 and 31020122012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020122012221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2611115442 + ... + 2611127321.

It is an arithmetic number, because the mean of its divisors is an integer number (1096670980440).

Almost surely, 2^{31020122012220} is an apocalyptic number.

31020122012220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31020122012220 is an abundant number, since it is smaller than the sum of its proper divisors (74260292110020).

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

31020122012220 is a wasteful number, since it uses less digits than its factorization.

31020122012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222242792 (or 5222242784 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31020122012220 its reverse (2221022102013), we get a palindrome (33241144114233).

The spelling of 31020122012220 in words is "thirty-one trillion, twenty billion, one hundred twenty-two million, twelve thousand, two hundred twenty".