12661213922272 has 24 divisors (see below), whose sum is σ = 24926857844616. Its totient is φ = 6330583358592.

The previous prime is 12661213922263. The next prime is 12661213922281. The reversal of 12661213922272 is 27222931216621.

It is an interprime number because it is at equal distance from previous prime (12661213922263) and next prime (12661213922281).

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, 10715518 + ... + 11838274.

It is an arithmetic number, because the mean of its divisors is an integer number (1038619076859).

Almost surely, 2^{12661213922272} is an apocalyptic number.

It is an amenable number.

12661213922272 is a deficient number, since it is larger than the sum of its proper divisors (12265643922344).

12661213922272 is a wasteful number, since it uses less digits than its factorization.

12661213922272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475170 (or 1475162 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The spelling of 12661213922272 in words is "twelve trillion, six hundred sixty-one billion, two hundred thirteen million, nine hundred twenty-two thousand, two hundred seventy-two".