20101020111020 has 24 divisors (see below), whose sum is σ = 42300267811200. Its totient is φ = 8023622220032.

The previous prime is 20101020110981. The next prime is 20101020111047. The reversal of 20101020111020 is 2011102010102.

It is a junction number, because it is equal to n+sod(n) for n = 20101020110992 and 20101020111010.

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, 1049104205 + ... + 1049123364.

It is an arithmetic number, because the mean of its divisors is an integer number (1762511158800).

Almost surely, 2^{20101020111020} is an apocalyptic number.

20101020111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101020111020 is an abundant number, since it is smaller than the sum of its proper divisors (22199247700180).

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

20101020111020 is a wasteful number, since it uses less digits than its factorization.

20101020111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098228057 (or 2098228055 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20101020111020 its reverse (2011102010102), we get a palindrome (22112122121122).

The spelling of 20101020111020 in words is "twenty trillion, one hundred one billion, twenty million, one hundred eleven thousand, twenty".