210021120222121 has 16 divisors (see below), whose sum is σ = 232857380246400. Its totient is φ = 188186780580480.

The previous prime is 210021120222113. The next prime is 210021120222131. The reversal of 210021120222121 is 121222021120012.

It is a cyclic number.

It is not a de Polignac number, because 210021120222121 - 2³ = 210021120222113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210021120222131) 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, 989933815 + ... + 990145948.

It is an arithmetic number, because the mean of its divisors is an integer number (14553586265400).

Almost surely, 2^{210021120222121} is an apocalyptic number.

It is an amenable number.

210021120222121 is a deficient number, since it is larger than the sum of its proper divisors (22836260024279).

210021120222121 is a wasteful number, since it uses less digits than its factorization.

210021120222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980080016.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210021120222121 its reverse (121222021120012), we get a palindrome (331243141342133).

The spelling of 210021120222121 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".