312221121312121 has 8 divisors (see below), whose sum is σ = 356825860110720. Its totient is φ = 267616812880608.

The previous prime is 312221121312119. The next prime is 312221121312137. The reversal of 312221121312121 is 121213121122213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312221121312121 - 2¹ = 312221121312119 is a prime.

It is a super-2 number, since 2×312221121312121² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312221121312151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106035676 + ... + 108940381.

It is an arithmetic number, because the mean of its divisors is an integer number (44603232513840).

Almost surely, 2^{312221121312121} is an apocalyptic number.

It is an amenable number.

312221121312121 is a deficient number, since it is larger than the sum of its proper divisors (44604738798599).

312221121312121 is a wasteful number, since it uses less digits than its factorization.

312221121312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215183543.

The product of its digits is 576, while the sum is 25.

Adding to 312221121312121 its reverse (121213121122213), we get a palindrome (433434242434334).

The spelling of 312221121312121 in words is "three hundred twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred twelve thousand, one hundred twenty-one".