23001211231 has 4 divisors (see below), whose sum is σ = 23490598752. Its totient is φ = 22511823712.

The previous prime is 23001211223. The next prime is 23001211253. The reversal of 23001211231 is 13211210032.

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

It is a cyclic number.

It is not a de Polignac number, because 23001211231 - 2³ = 23001211223 is a prime.

It is a super-2 number, since 2×23001211231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23001211291) 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, 244693690 + ... + 244693783.

It is an arithmetic number, because the mean of its divisors is an integer number (5872649688).

Almost surely, 2^23001211231 is an apocalyptic number.

23001211231 is a deficient number, since it is larger than the sum of its proper divisors (489387521).

23001211231 is an equidigital number, since it uses as much as digits as its factorization.

23001211231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489387520.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23001211231 its reverse (13211210032), we get a palindrome (36212421263).

The spelling of 23001211231 in words is "twenty-three billion, one million, two hundred eleven thousand, two hundred thirty-one".