20211111002120 has 32 divisors (see below), whose sum is σ = 45489750275520. Its totient is φ = 8081822086080.

The previous prime is 20211111001979. The next prime is 20211111002141. The reversal of 20211111002120 is 2120011111202.

It is a super-2 number, since 2×20211111002120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211111002095 and 20211111002104.

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, 81822476 + ... + 82069115.

It is an arithmetic number, because the mean of its divisors is an integer number (1421554696110).

Almost surely, 2^{20211111002120} is an apocalyptic number.

20211111002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211111002120 is an abundant number, since it is smaller than the sum of its proper divisors (25278639273400).

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

20211111002120 is a wasteful number, since it uses less digits than its factorization.

20211111002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163894685 (or 163894681 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20211111002120 its reverse (2120011111202), we get a palindrome (22331122113322).

The spelling of 20211111002120 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, two thousand, one hundred twenty".