213220102121 has 24 divisors (see below), whose sum is σ = 232999464960. Its totient is φ = 195022900800.

The previous prime is 213220102111. The next prime is 213220102157. The reversal of 213220102121 is 121201022312.

It is not a de Polignac number, because 213220102121 - 2¹⁴ = 213220085737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213220102121.

It is not an unprimeable number, because it can be changed into a prime (213220102111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8152856 + ... + 8178966.

It is an arithmetic number, because the mean of its divisors is an integer number (9708311040).

Almost surely, 2^213220102121 is an apocalyptic number.

It is an amenable number.

213220102121 is a deficient number, since it is larger than the sum of its proper divisors (19779362839).

213220102121 is a wasteful number, since it uses less digits than its factorization.

213220102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26577 (or 26564 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 213220102121 its reverse (121201022312), we get a palindrome (334421124433).

The spelling of 213220102121 in words is "two hundred thirteen billion, two hundred twenty million, one hundred two thousand, one hundred twenty-one".