10978131979121 has 4 divisors (see below), whose sum is σ = 11128517348772. Its totient is φ = 10827746609472.

The previous prime is 10978131979117. The next prime is 10978131979123. The reversal of 10978131979121 is 12197913187901.

10978131979121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7564210596721 + 3413921382400 = 2750311^2 + 1847680^2 .

It is a cyclic number.

It is not a de Polignac number, because 10978131979121 - 2² = 10978131979117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10978131979123) 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, 75192684716 + ... + 75192684861.

It is an arithmetic number, because the mean of its divisors is an integer number (2782129337193).

Almost surely, 2^{10978131979121} is an apocalyptic number.

It is an amenable number.

10978131979121 is a deficient number, since it is larger than the sum of its proper divisors (150385369651).

10978131979121 is an equidigital number, since it uses as much as digits as its factorization.

10978131979121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150385369650.

The product of its (nonzero) digits is 1714608, while the sum is 59.

The spelling of 10978131979121 in words is "ten trillion, nine hundred seventy-eight billion, one hundred thirty-one million, nine hundred seventy-nine thousand, one hundred twenty-one".