21123233000231 has 16 divisors (see below), whose sum is σ = 21530095073280. Its totient is φ = 20718019029120.

The previous prime is 21123233000227. The next prime is 21123233000299. The reversal of 21123233000231 is 13200033232112.

It is a cyclic number.

It is not a de Polignac number, because 21123233000231 - 2² = 21123233000227 is a prime.

It is a super-2 number, since 2×21123233000231² (a number of 27 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 = 21123233000197 and 21123233000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123233000431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125554490 + ... + 125722616.

It is an arithmetic number, because the mean of its divisors is an integer number (1345630942080).

Almost surely, 2^{21123233000231} is an apocalyptic number.

21123233000231 is a deficient number, since it is larger than the sum of its proper divisors (406862073049).

21123233000231 is a wasteful number, since it uses less digits than its factorization.

21123233000231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173014.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21123233000231 its reverse (13200033232112), we get a palindrome (34323266232343).

The spelling of 21123233000231 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred thirty-three million, two hundred thirty-one", and thus it is an aban number.