1231020412 has 12 divisors (see below), whose sum is σ = 2267669320. Its totient is φ = 583114896.

The previous prime is 1231020397. The next prime is 1231020457. The reversal of 1231020412 is 2140201321.

It is a super-2 number, since 2×1231020412² = 3030822509521299488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8098743 + ... + 8098894.

Almost surely, 2^1231020412 is an apocalyptic number.

It is an amenable number.

1231020412 is a deficient number, since it is larger than the sum of its proper divisors (1036648908).

1231020412 is a wasteful number, since it uses less digits than its factorization.

1231020412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16197660 (or 16197658 counting only the distinct ones).

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

The square root of 1231020412 is about 35085.9004729820. The cubic root of 1231020412 is about 1071.7374781813.

Adding to 1231020412 its reverse (2140201321), we get a palindrome (3371221733).

The spelling of 1231020412 in words is "one billion, two hundred thirty-one million, twenty thousand, four hundred twelve".