312102111465 has 24 divisors (see below), whose sum is σ = 541195586568. Its totient is φ = 166387200000.

The previous prime is 312102111371. The next prime is 312102111469. The reversal of 312102111465 is 564111201213.

It can be written as a sum of positive squares in 4 ways, for example, as 42918580224 + 269183531241 = 207168^2 + 518829^2 .

It is not a de Polignac number, because 312102111465 - 2¹⁹ = 312101587177 is a prime.

It is a super-2 number, since 2×312102111465² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312102111469) 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, 1288536 + ... + 1511465.

It is an arithmetic number, because the mean of its divisors is an integer number (22549816107).

Almost surely, 2^312102111465 is an apocalyptic number.

It is an amenable number.

312102111465 is a deficient number, since it is larger than the sum of its proper divisors (229093475103).

312102111465 is a wasteful number, since it uses less digits than its factorization.

312102111465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802489 (or 2802486 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

Adding to 312102111465 its reverse (564111201213), we get a palindrome (876213312678).

The spelling of 312102111465 in words is "three hundred twelve billion, one hundred two million, one hundred eleven thousand, four hundred sixty-five".