31020123022220 has 24 divisors (see below), whose sum is σ = 65169663687744. Its totient is φ = 12402829143936.

The previous prime is 31020123022169. The next prime is 31020123022237. The reversal of 31020123022220 is 2222032102013.

It is a happy number.

It is a super-2 number, since 2×31020123022220² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31020123022192 and 31020123022201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326205332 + ... + 326300411.

It is an arithmetic number, because the mean of its divisors is an integer number (2715402653656).

Almost surely, 2^{31020123022220} is an apocalyptic number.

It is an amenable number.

31020123022220 is an abundant number, since it is smaller than the sum of its proper divisors (34149540665524).

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

31020123022220 is a wasteful number, since it uses less digits than its factorization.

31020123022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652508129 (or 652508127 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31020123022220 its reverse (2222032102013), we get a palindrome (33242155124233).

The spelling of 31020123022220 in words is "thirty-one trillion, twenty billion, one hundred twenty-three million, twenty-two thousand, two hundred twenty".