1212312313 has 32 divisors (see below), whose sum is σ = 1402168320. Its totient is φ = 1041469440.

The previous prime is 1212312307. The next prime is 1212312329. The reversal of 1212312313 is 3132132121.

It is not a de Polignac number, because 1212312313 - 2¹⁷ = 1212181241 is a prime.

It is a super-2 number, since 2×1212312313² = 2939402288502819938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212312113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 752653 + ... + 754261.

It is an arithmetic number, because the mean of its divisors is an integer number (43817760).

Almost surely, 2^1212312313 is an apocalyptic number.

It is an amenable number.

1212312313 is a deficient number, since it is larger than the sum of its proper divisors (189856007).

1212312313 is a wasteful number, since it uses less digits than its factorization.

1212312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737.

The product of its digits is 216, while the sum is 19.

The square root of 1212312313 is about 34818.2755604007. The cubic root of 1212312313 is about 1066.2805943411.

Adding to 1212312313 its reverse (3132132121), we get a palindrome (4344444434).

The spelling of 1212312313 in words is "one billion, two hundred twelve million, three hundred twelve thousand, three hundred thirteen".