210211220112021 has 6 divisors (see below), whose sum is σ = 303638429050710. Its totient is φ = 140140813408008.

The previous prime is 210211220111983. The next prime is 210211220112037. The reversal of 210211220112021 is 120211022112012.

210211220112021 is a `hidden beast` number, since 21 + 0 + 211 + 220 + 11 + 202 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 196066813692996 + 14144406419025 = 14002386^2 + 3760905^2 .

It is not a de Polignac number, because 210211220112021 - 2⁶ = 210211220111957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210211220111985 and 210211220112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210211220113021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11678401117326 + ... + 11678401117343.

It is an arithmetic number, because the mean of its divisors is an integer number (50606404841785).

Almost surely, 2^{210211220112021} is an apocalyptic number.

It is an amenable number.

210211220112021 is a deficient number, since it is larger than the sum of its proper divisors (93427208938689).

210211220112021 is a wasteful number, since it uses less digits than its factorization.

210211220112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23356802234675 (or 23356802234672 counting only the distinct ones).

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

Adding to 210211220112021 its reverse (120211022112012), we get a palindrome (330422242224033).

The spelling of 210211220112021 in words is "two hundred ten trillion, two hundred eleven billion, two hundred twenty million, one hundred twelve thousand, twenty-one".