1312120202 has 12 divisors (see below), whose sum is σ = 2077221906. Its totient is φ = 621530280.

The previous prime is 1312120153. The next prime is 1312120211. The reversal of 1312120202 is 2020212131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 728946001 + 583174201 = 26999^2 + 24149^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 907949 + ... + 909392.

Almost surely, 2^1312120202 is an apocalyptic number.

1312120202 is a deficient number, since it is larger than the sum of its proper divisors (765101704).

1312120202 is a wasteful number, since it uses less digits than its factorization.

1312120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817381 (or 1817362 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1312120202 is about 36223.1997758343. The cubic root of 1312120202 is about 1094.7741663640.

Adding to 1312120202 its reverse (2020212131), we get a palindrome (3332332333).

The spelling of 1312120202 in words is "one billion, three hundred twelve million, one hundred twenty thousand, two hundred two".