121310221220211 has 128 divisors (see below), whose sum is σ = 180482676940800. Its totient is φ = 72222740029440.

The previous prime is 121310221220203. The next prime is 121310221220219. The reversal of 121310221220211 is 112022122013121.

It is an interprime number because it is at equal distance from previous prime (121310221220203) and next prime (121310221220219).

It is not a de Polignac number, because 121310221220211 - 2³ = 121310221220203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121310221220219) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2246749831 + ... + 2246803823.

It is an arithmetic number, because the mean of its divisors is an integer number (1410020913600).

Almost surely, 2^{121310221220211} is an apocalyptic number.

121310221220211 is a deficient number, since it is larger than the sum of its proper divisors (59172455720589).

121310221220211 is a wasteful number, since it uses less digits than its factorization.

121310221220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54421.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121310221220211 its reverse (112022122013121), we get a palindrome (233332343233332).

The spelling of 121310221220211 in words is "one hundred twenty-one trillion, three hundred ten billion, two hundred twenty-one million, two hundred twenty thousand, two hundred eleven".