2321555121253 has 4 divisors (see below), whose sum is σ = 2321580949600. Its totient is φ = 2321529292908.

The previous prime is 2321555121239. The next prime is 2321555121283. The reversal of 2321555121253 is 3521215551232.

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 a de Polignac number, because none of the positive numbers 2^k-2321555121253 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 (2321555121283) 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, 12778875 + ... + 12959272.

It is an arithmetic number, because the mean of its divisors is an integer number (580395237400).

Almost surely, 2^{2321555121253} is an apocalyptic number.

It is an amenable number.

2321555121253 is a deficient number, since it is larger than the sum of its proper divisors (25828347).

2321555121253 is an equidigital number, since it uses as much as digits as its factorization.

2321555121253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25828346.

The product of its digits is 90000, while the sum is 37.

The spelling of 2321555121253 in words is "two trillion, three hundred twenty-one billion, five hundred fifty-five million, one hundred twenty-one thousand, two hundred fifty-three".