211102010021 has 16 divisors (see below), whose sum is σ = 242066872320. Its totient is φ = 180339730560.

The previous prime is 211102010017. The next prime is 211102010059. The reversal of 211102010021 is 120010201112.

It is a cyclic number.

It is not a de Polignac number, because 211102010021 - 2² = 211102010017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211102009984 and 211102010011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211102010081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3567740 + ... + 3626426.

It is an arithmetic number, because the mean of its divisors is an integer number (15129179520).

Almost surely, 2^211102010021 is an apocalyptic number.

It is an amenable number.

211102010021 is a deficient number, since it is larger than the sum of its proper divisors (30964862299).

211102010021 is a wasteful number, since it uses less digits than its factorization.

211102010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60404.

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

Adding to 211102010021 its reverse (120010201112), we get a palindrome (331112211133).

The spelling of 211102010021 in words is "two hundred eleven billion, one hundred two million, ten thousand, twenty-one".