213122032121 has 4 divisors (see below), whose sum is σ = 224338981200. Its totient is φ = 201905083044.

The previous prime is 213122032069. The next prime is 213122032133. The reversal of 213122032121 is 121230221312.

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 213122032121 - 2¹⁰ = 213122031097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213122032093 and 213122032102.

It is not an unprimeable number, because it can be changed into a prime (213122032421) 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, 5608474511 + ... + 5608474548.

It is an arithmetic number, because the mean of its divisors is an integer number (56084745300).

Almost surely, 2^213122032121 is an apocalyptic number.

It is an amenable number.

213122032121 is a deficient number, since it is larger than the sum of its proper divisors (11216949079).

213122032121 is a wasteful number, since it uses less digits than its factorization.

213122032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11216949078.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 213122032121 its reverse (121230221312), we get a palindrome (334352253433).

The spelling of 213122032121 in words is "two hundred thirteen billion, one hundred twenty-two million, thirty-two thousand, one hundred twenty-one".