21116151053 has 4 divisors (see below), whose sum is σ = 21797317248. Its totient is φ = 20434984860.

The previous prime is 21116151013. The next prime is 21116151079. The reversal of 21116151053 is 35015161112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21116151053 - 2³⁰ = 20042409229 is a prime.

It is a super-2 number, since 2×21116151053² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116151013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340583051 + ... + 340583112.

It is an arithmetic number, because the mean of its divisors is an integer number (5449329312).

Almost surely, 2^21116151053 is an apocalyptic number.

It is an amenable number.

21116151053 is a deficient number, since it is larger than the sum of its proper divisors (681166195).

21116151053 is an equidigital number, since it uses as much as digits as its factorization.

21116151053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681166194.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 21116151053 in words is "twenty-one billion, one hundred sixteen million, one hundred fifty-one thousand, fifty-three".