21312122000233 has 4 divisors (see below), whose sum is σ = 21333160621188. Its totient is φ = 21291083379280.

The previous prime is 21312122000189. The next prime is 21312122000237. The reversal of 21312122000233 is 33200022121312.

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 899409450384 + 20412712549849 = 948372^2 + 4518043^2 .

It is a cyclic number.

It is not a de Polignac number, because 21312122000233 - 2²⁵ = 21312088445801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312122000237) 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, 10519308958 + ... + 10519310983.

It is an arithmetic number, because the mean of its divisors is an integer number (5333290155297).

Almost surely, 2^{21312122000233} is an apocalyptic number.

It is an amenable number.

21312122000233 is a deficient number, since it is larger than the sum of its proper divisors (21038620955).

21312122000233 is a wasteful number, since it uses less digits than its factorization.

21312122000233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21038620954.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21312122000233 its reverse (33200022121312), we get a palindrome (54512144121545).

The spelling of 21312122000233 in words is "twenty-one trillion, three hundred twelve billion, one hundred twenty-two million, two hundred thirty-three", and thus it is an aban number.