20211101002120 has 64 divisors (see below), whose sum is σ = 51979046958720. Its totient is φ = 6928501092864.

The previous prime is 20211101002109. The next prime is 20211101002223. The reversal of 20211101002120 is 2120010111202.

It is a self number, because there is not a number n which added to its sum of digits gives 20211101002120.

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, 3400357 + ... + 7210036.

It is an arithmetic number, because the mean of its divisors is an integer number (812172608730).

Almost surely, 2^{20211101002120} is an apocalyptic number.

20211101002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211101002120 is an abundant number, since it is smaller than the sum of its proper divisors (31767945956600).

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

20211101002120 is a wasteful number, since it uses less digits than its factorization.

20211101002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10617214 (or 10617210 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20211101002120 its reverse (2120010111202), we get a palindrome (22331111113322).

The spelling of 20211101002120 in words is "twenty trillion, two hundred eleven billion, one hundred one million, two thousand, one hundred twenty".