31112302021020 has 192 divisors, whose sum is σ = 106681859827200. Its totient is φ = 7464619653120.

The previous prime is 31112302020971. The next prime is 31112302021027. The reversal of 31112302021020 is 2012020321113.

31112302021020 is a `hidden beast` number, since 311 + 1 + 230 + 20 + 2 + 102 + 0 = 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 = 31112302020984 and 31112302021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112302021027) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26422590 + ... + 27574949.

It is an arithmetic number, because the mean of its divisors is an integer number (555634686600).

Almost surely, 2^{31112302021020} is an apocalyptic number.

31112302021020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31112302021020 is an abundant number, since it is smaller than the sum of its proper divisors (75569557806180).

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

31112302021020 is a wasteful number, since it uses less digits than its factorization.

31112302021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53997665 (or 53997657 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31112302021020 its reverse (2012020321113), we get a palindrome (33124322342133).

The spelling of 31112302021020 in words is "thirty-one trillion, one hundred twelve billion, three hundred two million, twenty-one thousand, twenty".