27121012172 has 12 divisors (see below), whose sum is σ = 47470078656. Its totient is φ = 13558132560.

The previous prime is 27121012157. The next prime is 27121012187.

27121012172 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (27121012157) and next prime (27121012187).

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, 567548 + ... + 613475.

It is an arithmetic number, because the mean of its divisors is an integer number (3955839888).

Almost surely, 2^27121012172 is an apocalyptic number.

It is an amenable number.

27121012172 is a deficient number, since it is larger than the sum of its proper divisors (20349066484).

27121012172 is a wasteful number, since it uses less digits than its factorization.

27121012172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186768 (or 1186766 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

It can be divided in two parts, 271210 and 12172, that added together give a palindrome (283382).

The spelling of 27121012172 in words is "twenty-seven billion, one hundred twenty-one million, twelve thousand, one hundred seventy-two".