31111031301020 has 48 divisors (see below), whose sum is σ = 71278050816000. Its totient is φ = 11312228262720.

The previous prime is 31111031301017. The next prime is 31111031301079. The reversal of 31111031301020 is 2010313011113.

It is a super-2 number, since 2×31111031301020² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31111031301020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2605220 + ... + 8307179.

It is an arithmetic number, because the mean of its divisors is an integer number (1484959392000).

Almost surely, 2^{31111031301020} is an apocalyptic number.

It is an amenable number.

31111031301020 is an abundant number, since it is smaller than the sum of its proper divisors (40167019514980).

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

31111031301020 is a wasteful number, since it uses less digits than its factorization.

31111031301020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10925378 (or 10925376 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31111031301020 its reverse (2010313011113), we get a palindrome (33121344312133).

The spelling of 31111031301020 in words is "thirty-one trillion, one hundred eleven billion, thirty-one million, three hundred one thousand, twenty".