31101110310020 has 96 divisors (see below), whose sum is σ = 69368924620800. Its totient is φ = 11672343609344.

The previous prime is 31101110309981. The next prime is 31101110310043. The reversal of 31101110310020 is 2001301110113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31101110309977 and 31101110310004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200648669 + ... + 200803611.

It is an arithmetic number, because the mean of its divisors is an integer number (722592964800).

Almost surely, 2^{31101110310020} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31101110310020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34684462310400).

31101110310020 is an abundant number, since it is smaller than the sum of its proper divisors (38267814310780).

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

31101110310020 is a wasteful number, since it uses less digits than its factorization.

31101110310020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156797 (or 156795 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31101110310020 its reverse (2001301110113), we get a palindrome (33102411420133).

The spelling of 31101110310020 in words is "thirty-one trillion, one hundred one billion, one hundred ten million, three hundred ten thousand, twenty".