2321131201021 has 8 divisors (see below), whose sum is σ = 2322704610360. Its totient is φ = 2319558269952.

The previous prime is 2321131201009. The next prime is 2321131201027. The reversal of 2321131201021 is 1201021311232.

It can be written as a sum of positive squares in 4 ways, for example, as 247202868025 + 2073928332996 = 497195^2 + 1440114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2321131201021 - 2⁵ = 2321131200989 is a prime.

It is a super-2 number, since 2×2321131201021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2321131201021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321131201027) 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 7 ways as a sum of consecutive naturals, for example, 9871065 + ... + 10103473.

It is an arithmetic number, because the mean of its divisors is an integer number (290338076295).

Almost surely, 2^{2321131201021} is an apocalyptic number.

It is an amenable number.

2321131201021 is a deficient number, since it is larger than the sum of its proper divisors (1573409339).

2321131201021 is a wasteful number, since it uses less digits than its factorization.

2321131201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239135.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2321131201021 its reverse (1201021311232), we get a palindrome (3522152512253).

The spelling of 2321131201021 in words is "two trillion, three hundred twenty-one billion, one hundred thirty-one million, two hundred one thousand, twenty-one".