213020230121 has 4 divisors (see below), whose sum is σ = 224231821200. Its totient is φ = 201808639044.

The previous prime is 213020230117. The next prime is 213020230153. The reversal of 213020230121 is 121032020312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213020230121 - 2² = 213020230117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213020230121.

It is not an unprimeable number, because it can be changed into a prime (213020233121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5605795511 + ... + 5605795548.

It is an arithmetic number, because the mean of its divisors is an integer number (56057955300).

Almost surely, 2^213020230121 is an apocalyptic number.

It is an amenable number.

213020230121 is a deficient number, since it is larger than the sum of its proper divisors (11211591079).

213020230121 is a wasteful number, since it uses less digits than its factorization.

213020230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11211591078.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 213020230121 its reverse (121032020312), we get a palindrome (334052250433).

The spelling of 213020230121 in words is "two hundred thirteen billion, twenty million, two hundred thirty thousand, one hundred twenty-one".