2572100120021 has 4 divisors (see below), whose sum is σ = 2572143258432. Its totient is φ = 2572056981612.

The previous prime is 2572100119913. The next prime is 2572100120027. The reversal of 2572100120021 is 1200210012752.

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 2572100120021 - 2¹⁰ = 2572100118997 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 (2572100120027) 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, 21479645 + ... + 21599058.

It is an arithmetic number, because the mean of its divisors is an integer number (643035814608).

Almost surely, 2^{2572100120021} is an apocalyptic number.

It is an amenable number.

2572100120021 is a deficient number, since it is larger than the sum of its proper divisors (43138411).

2572100120021 is an equidigital number, since it uses as much as digits as its factorization.

2572100120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43138410.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 2572100120021 its reverse (1200210012752), we get a palindrome (3772310132773).

The spelling of 2572100120021 in words is "two trillion, five hundred seventy-two billion, one hundred million, one hundred twenty thousand, twenty-one".