210121233012021 has 16 divisors (see below), whose sum is σ = 280231631577536. Its totient is φ = 140045829278976.

The previous prime is 210121233012017. The next prime is 210121233012043. The reversal of 210121233012021 is 120210332121012.

It is not a de Polignac number, because 210121233012021 - 2² = 210121233012017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121233012001) 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, 1423386411 + ... + 1423534023.

It is an arithmetic number, because the mean of its divisors is an integer number (17514476973596).

Almost surely, 2^{210121233012021} is an apocalyptic number.

It is an amenable number.

210121233012021 is a deficient number, since it is larger than the sum of its proper divisors (70110398565515).

210121233012021 is a wasteful number, since it uses less digits than its factorization.

210121233012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262932.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 210121233012021 its reverse (120210332121012), we get a palindrome (330331565133033).

The spelling of 210121233012021 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred thirty-three million, twelve thousand, twenty-one".