211010211000021 has 16 divisors (see below), whose sum is σ = 281635903575936. Its totient is φ = 140529040709376.

The previous prime is 211010211000013. The next prime is 211010211000091. The reversal of 211010211000021 is 120000112010112.

It is not a de Polignac number, because 211010211000021 - 2³ = 211010211000013 is a prime.

It is a super-3 number, since 3×211010211000021³ (a number of 44 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211010210999970 and 211010211000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010211000091) 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, 13420521 + ... + 24538353.

It is an arithmetic number, because the mean of its divisors is an integer number (17602243973496).

Almost surely, 2^{211010211000021} is an apocalyptic number.

It is an amenable number.

211010211000021 is a deficient number, since it is larger than the sum of its proper divisors (70625692575915).

211010211000021 is a wasteful number, since it uses less digits than its factorization.

211010211000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11124332.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211010211000021 its reverse (120000112010112), we get a palindrome (331010323010133).

The spelling of 211010211000021 in words is "two hundred eleven trillion, ten billion, two hundred eleven million, twenty-one", and thus it is an aban number.