21100232153 has 16 divisors (see below), whose sum is σ = 28330382976. Its totient is φ = 15176989440.

The previous prime is 21100232149. The next prime is 21100232171. The reversal of 21100232153 is 35123200112.

It is a cyclic number.

It is not a de Polignac number, because 21100232153 - 2² = 21100232149 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100232173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10538576 + ... + 10540577.

It is an arithmetic number, because the mean of its divisors is an integer number (1770648936).

Almost surely, 2^21100232153 is an apocalyptic number.

It is an amenable number.

21100232153 is a deficient number, since it is larger than the sum of its proper divisors (7230150823).

21100232153 is a wasteful number, since it uses less digits than its factorization.

21100232153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21079184.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21100232153 its reverse (35123200112), we get a palindrome (56223432265).

The spelling of 21100232153 in words is "twenty-one billion, one hundred million, two hundred thirty-two thousand, one hundred fifty-three".