21142311135091 has 16 divisors (see below), whose sum is σ = 22105987718400. Its totient is φ = 20182350782880.

The previous prime is 21142311135061. The next prime is 21142311135139. The reversal of 21142311135091 is 19053111324112.

It is a cyclic number.

It is not a de Polignac number, because 21142311135091 - 2⁵ = 21142311135059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21142311135031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76548360 + ... + 76824058.

It is an arithmetic number, because the mean of its divisors is an integer number (1381624232400).

Almost surely, 2^{21142311135091} is an apocalyptic number.

21142311135091 is a deficient number, since it is larger than the sum of its proper divisors (963676583309).

21142311135091 is a wasteful number, since it uses less digits than its factorization.

21142311135091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282426.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 21142311135091 in words is "twenty-one trillion, one hundred forty-two billion, three hundred eleven million, one hundred thirty-five thousand, ninety-one".