21253056633101 has 4 divisors (see below), whose sum is σ = 21254067789600. Its totient is φ = 21252045476604.

The previous prime is 21253056633001. The next prime is 21253056633119. The reversal of 21253056633101 is 10133665035212.

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 21253056633101 - 2¹⁰ = 21253056632077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21253056633191) 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, 505546721 + ... + 505588758.

It is an arithmetic number, because the mean of its divisors is an integer number (5313516947400).

Almost surely, 2^{21253056633101} is an apocalyptic number.

It is an amenable number.

21253056633101 is a deficient number, since it is larger than the sum of its proper divisors (1011156499).

21253056633101 is a wasteful number, since it uses less digits than its factorization.

21253056633101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011156498.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 21253056633101 in words is "twenty-one trillion, two hundred fifty-three billion, fifty-six million, six hundred thirty-three thousand, one hundred one".