21577153231001 has 4 divisors (see below), whose sum is σ = 21596930641104. Its totient is φ = 21557375820900.

The previous prime is 21577153230989. The next prime is 21577153231009. The reversal of 21577153231001 is 10013235177512.

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 a cyclic number.

It is not a de Polignac number, because 21577153231001 - 2⁴² = 17179106719897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21577153231009) 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, 9888703415 + ... + 9888705596.

It is an arithmetic number, because the mean of its divisors is an integer number (5399232660276).

Almost surely, 2^{21577153231001} is an apocalyptic number.

It is an amenable number.

21577153231001 is a deficient number, since it is larger than the sum of its proper divisors (19777410103).

21577153231001 is a wasteful number, since it uses less digits than its factorization.

21577153231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19777410102.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 21577153231001 in words is "twenty-one trillion, five hundred seventy-seven billion, one hundred fifty-three million, two hundred thirty-one thousand, one".