1291427930812 has 12 divisors (see below), whose sum is σ = 2280732814360. Its totient is φ = 639789983856.

The previous prime is 1291427930809. The next prime is 1291427930813. The reversal of 1291427930812 is 2180397241921.

It is a super-2 number, since 2×1291427930812² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291427930813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480994898 + ... + 1480995769.

Almost surely, 2^{1291427930812} is an apocalyptic number.

It is an amenable number.

1291427930812 is a deficient number, since it is larger than the sum of its proper divisors (989304883548).

1291427930812 is a wasteful number, since it uses less digits than its factorization.

1291427930812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961990780 (or 2961990778 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 1291427930812 in words is "one trillion, two hundred ninety-one billion, four hundred twenty-seven million, nine hundred thirty thousand, eight hundred twelve".