1312222012 has 24 divisors (see below), whose sum is σ = 2343340832. Its totient is φ = 642816000.

The previous prime is 1312222003. The next prime is 1312222019. The reversal of 1312222012 is 2102222131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312222019) 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, 29212 + ... + 58972.

Almost surely, 2^1312222012 is an apocalyptic number.

It is an amenable number.

1312222012 is a deficient number, since it is larger than the sum of its proper divisors (1031118820).

1312222012 is a wasteful number, since it uses less digits than its factorization.

1312222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29989 (or 29987 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1312222012 is about 36224.6050634096. The cubic root of 1312222012 is about 1094.8024808622.

Adding to 1312222012 its reverse (2102222131), we get a palindrome (3414444143).

The spelling of 1312222012 in words is "one billion, three hundred twelve million, two hundred twenty-two thousand, twelve".