211100000202021 has 96 divisors (see below), whose sum is σ = 335326692879360. Its totient is φ = 117745385184000.

The previous prime is 211100000202011. The next prime is 211100000202023. The reversal of 211100000202021 is 120202000001112.

It is not a de Polignac number, because 211100000202021 - 2⁴⁶ = 140731256024357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211100000201988 and 211100000202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100000202023) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2987214730 + ... + 2987285396.

It is an arithmetic number, because the mean of its divisors is an integer number (3492986384160).

Almost surely, 2^{211100000202021} is an apocalyptic number.

211100000202021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211100000202021 is a deficient number, since it is larger than the sum of its proper divisors (124226692677339).

211100000202021 is a wasteful number, since it uses less digits than its factorization.

211100000202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73175 (or 73168 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211100000202021 its reverse (120202000001112), we get a palindrome (331302000203133).

The spelling of 211100000202021 in words is "two hundred eleven trillion, one hundred billion, two hundred two thousand, twenty-one".