2315200022021 has 4 divisors (see below), whose sum is σ = 2315473662444. Its totient is φ = 2314926381600.

The previous prime is 2315200021963. The next prime is 2315200022099. The reversal of 2315200022021 is 1202200025132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1016842324996 + 1298357697025 = 1008386^2 + 1139455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315200022021 - 2⁶ = 2315200021957 is a prime.

It is a super-2 number, since 2×2315200022021² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2315200021984 and 2315200022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2315200322021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136807520 + ... + 136824441.

It is an arithmetic number, because the mean of its divisors is an integer number (578868415611).

Almost surely, 2^{2315200022021} is an apocalyptic number.

It is an amenable number.

2315200022021 is a deficient number, since it is larger than the sum of its proper divisors (273640423).

2315200022021 is an equidigital number, since it uses as much as digits as its factorization.

2315200022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273640422.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 2315200022021 its reverse (1202200025132), we get a palindrome (3517400047153).

The spelling of 2315200022021 in words is "two trillion, three hundred fifteen billion, two hundred million, twenty-two thousand, twenty-one".