1312011222152 has 8 divisors (see below), whose sum is σ = 2460021041550. Its totient is φ = 656005611072.

The previous prime is 1312011222143. The next prime is 1312011222169. The reversal of 1312011222152 is 2512221102131.

It can be written as a sum of positive squares in only one way, i.e., 1252595209636 + 59416012516 = 1119194^2 + 243754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1312011222152² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82000701377 + ... + 82000701392.

Almost surely, 2^{1312011222152} is an apocalyptic number.

It is an amenable number.

1312011222152 is a deficient number, since it is larger than the sum of its proper divisors (1148009819398).

1312011222152 is a wasteful number, since it uses less digits than its factorization.

1312011222152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164001402775 (or 164001402771 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1312011222152 its reverse (2512221102131), we get a palindrome (3824232324283).

The spelling of 1312011222152 in words is "one trillion, three hundred twelve billion, eleven million, two hundred twenty-two thousand, one hundred fifty-two".