21123301312233 has 6 divisors (see below), whose sum is σ = 30511435228794. Its totient is φ = 14082200874816.

The previous prime is 21123301312229. The next prime is 21123301312247. The reversal of 21123301312233 is 33221310332112.

21123301312233 is a `hidden beast` number, since 2 + 1 + 1 + 23 + 301 + 312 + 23 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14084085777129 + 7039215535104 = 3752877^2 + 2653152^2 .

It is not a de Polignac number, because 21123301312233 - 2² = 21123301312229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21123301312197 and 21123301312206.

It is not an unprimeable number, because it can be changed into a prime (21123301312273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1173516739560 + ... + 1173516739577.

It is an arithmetic number, because the mean of its divisors is an integer number (5085239204799).

Almost surely, 2^{21123301312233} is an apocalyptic number.

It is an amenable number.

21123301312233 is a deficient number, since it is larger than the sum of its proper divisors (9388133916561).

21123301312233 is a wasteful number, since it uses less digits than its factorization.

21123301312233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347033479143 (or 2347033479140 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21123301312233 its reverse (33221310332112), we get a palindrome (54344611644345).

The spelling of 21123301312233 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred one million, three hundred twelve thousand, two hundred thirty-three".