12155665032251 has 8 divisors (see below), whose sum is σ = 13090767449760. Its totient is φ = 11220569937792.

The previous prime is 12155665032221. The next prime is 12155665032271. The reversal of 12155665032251 is 15223056655121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12155665032251 - 2⁶ = 12155665032187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12155665032211) 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, 1898066 + ... + 5283368.

It is an arithmetic number, because the mean of its divisors is an integer number (1636345931220).

Almost surely, 2^{12155665032251} is an apocalyptic number.

12155665032251 is a deficient number, since it is larger than the sum of its proper divisors (935102417509).

12155665032251 is a wasteful number, since it uses less digits than its factorization.

12155665032251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661525.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 12155665032251 in words is "twelve trillion, one hundred fifty-five billion, six hundred sixty-five million, thirty-two thousand, two hundred fifty-one".