31100020123120 has 80 divisors (see below), whose sum is σ = 77910893383680. Its totient is φ = 11477004705792.

The previous prime is 31100020123111. The next prime is 31100020123171. The reversal of 31100020123120 is 2132102000113.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×31100020123120² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31100020123094 and 31100020123103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5950704 + ... + 9879823.

It is an arithmetic number, because the mean of its divisors is an integer number (973886167296).

Almost surely, 2^{31100020123120} is an apocalyptic number.

It is an amenable number.

31100020123120 is an abundant number, since it is smaller than the sum of its proper divisors (46810873260560).

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

31100020123120 is a wasteful number, since it uses less digits than its factorization.

31100020123120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15832442 (or 15832436 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31100020123120 its reverse (2132102000113), we get a palindrome (33232122123233).

The spelling of 31100020123120 in words is "thirty-one trillion, one hundred billion, twenty million, one hundred twenty-three thousand, one hundred twenty".