13121900527 has 4 divisors (see below), whose sum is σ = 13139657560. Its totient is φ = 13104143496.

The previous prime is 13121900513. The next prime is 13121900543. The reversal of 13121900527 is 72500912131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13121900527 - 2¹⁹ = 13121376239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121900587) 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, 8877408 + ... + 8878885.

It is an arithmetic number, because the mean of its divisors is an integer number (3284914390).

Almost surely, 2^13121900527 is an apocalyptic number.

13121900527 is a deficient number, since it is larger than the sum of its proper divisors (17757033).

13121900527 is an equidigital number, since it uses as much as digits as its factorization.

13121900527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17757032.

The product of its (nonzero) digits is 3780, while the sum is 31.

The spelling of 13121900527 in words is "thirteen billion, one hundred twenty-one million, nine hundred thousand, five hundred twenty-seven".