211011022100021 has 32 divisors (see below), whose sum is σ = 250914885580800. Its totient is φ = 174928673983680.

The previous prime is 211011022100009. The next prime is 211011022100023. The reversal of 211011022100021 is 120001220110112.

It is a cyclic number.

It is not a de Polignac number, because 211011022100021 - 2²⁶ = 211010954991157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211011022099969 and 211011022100005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211011022100023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13714001 + ... + 24700118.

It is an arithmetic number, because the mean of its divisors is an integer number (7841090174400).

Almost surely, 2^{211011022100021} is an apocalyptic number.

It is an amenable number.

211011022100021 is a deficient number, since it is larger than the sum of its proper divisors (39903863480779).

211011022100021 is a wasteful number, since it uses less digits than its factorization.

211011022100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38414609.

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

Adding to 211011022100021 its reverse (120001220110112), we get a palindrome (331012242210133).

The spelling of 211011022100021 in words is "two hundred eleven trillion, eleven billion, twenty-two million, one hundred thousand, twenty-one".