121222320213 has 32 divisors (see below), whose sum is σ = 163701457920. Its totient is φ = 79786586880.

The previous prime is 121222320209. The next prime is 121222320239. The reversal of 121222320213 is 312023222121.

It is not a de Polignac number, because 121222320213 - 2² = 121222320209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121222320213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222320253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96283978 + ... + 96285236.

It is an arithmetic number, because the mean of its divisors is an integer number (5115670560).

Almost surely, 2^121222320213 is an apocalyptic number.

It is an amenable number.

121222320213 is a deficient number, since it is larger than the sum of its proper divisors (42479137707).

121222320213 is a wasteful number, since it uses less digits than its factorization.

121222320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 121222320213 its reverse (312023222121), we get a palindrome (433245542334).

The spelling of 121222320213 in words is "one hundred twenty-one billion, two hundred twenty-two million, three hundred twenty thousand, two hundred thirteen".