211210202112021 has 64 divisors (see below), whose sum is σ = 367959276771840. Its totient is φ = 117241925299200.

The previous prime is 211210202111981. The next prime is 211210202112023. The reversal of 211210202112021 is 120211202012112.

211210202112021 is a `hidden beast` number, since 21 + 1 + 210 + 20 + 211 + 202 + 1 = 666.

It is not a de Polignac number, because 211210202112021 - 2⁶ = 211210202111957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211210202111985 and 211210202112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210202112023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103370340 + ... + 105393773.

It is an arithmetic number, because the mean of its divisors is an integer number (5749363699560).

Almost surely, 2^{211210202112021} is an apocalyptic number.

211210202112021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211210202112021 is a deficient number, since it is larger than the sum of its proper divisors (156749074659819).

211210202112021 is a wasteful number, since it uses less digits than its factorization.

211210202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208764283 (or 208764277 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211210202112021 its reverse (120211202012112), we get a palindrome (331421404124133).

Subtracting from 211210202112021 its reverse (120211202012112), we obtain a palindrome (90999000099909).

The spelling of 211210202112021 in words is "two hundred eleven trillion, two hundred ten billion, two hundred two million, one hundred twelve thousand, twenty-one".