20101020110992 has 20 divisors (see below), whose sum is σ = 38946114769900. Its totient is φ = 10050409847808.

The previous prime is 20101020110981. The next prime is 20101020111047. The reversal of 20101020110992 is 29901102010102.

It can be written as a sum of positive squares in 2 ways, for example, as 1310667784336 + 18790352326656 = 1144844^2 + 4334784^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20101020110992.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4594617 + ... + 7830232.

It is an arithmetic number, because the mean of its divisors is an integer number (1947305738495).

Almost surely, 2^{20101020110992} is an apocalyptic number.

It is an amenable number.

20101020110992 is a deficient number, since it is larger than the sum of its proper divisors (18845094658908).

20101020110992 is a wasteful number, since it uses less digits than its factorization.

20101020110992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525970 (or 12525964 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 20101020110992 in words is "twenty trillion, one hundred one billion, twenty million, one hundred ten thousand, nine hundred ninety-two".