312322122011221 has 16 divisors (see below), whose sum is σ = 365771106650880. Its totient is φ = 261085511157120.

The previous prime is 312322122011183. The next prime is 312322122011227. The reversal of 312322122011221 is 122110221223213.

It is a cyclic number.

It is not a de Polignac number, because 312322122011221 - 2¹³ = 312322122003029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312322122011227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186210561 + ... + 187880326.

It is an arithmetic number, because the mean of its divisors is an integer number (22860694165680).

Almost surely, 2^{312322122011221} is an apocalyptic number.

It is an amenable number.

312322122011221 is a deficient number, since it is larger than the sum of its proper divisors (53448984639659).

312322122011221 is a wasteful number, since it uses less digits than its factorization.

312322122011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374093844.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 312322122011221 its reverse (122110221223213), we get a palindrome (434432343234434).

The spelling of 312322122011221 in words is "three hundred twelve trillion, three hundred twenty-two billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".