23012011021 has 8 divisors (see below), whose sum is σ = 23550310784. Its totient is φ = 22473853920.

The previous prime is 23012011013. The next prime is 23012011051. The reversal of 23012011021 is 12011021032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23012011021 - 2³ = 23012011013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23012010992 and 23012011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012011051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335281 + ... + 398041.

It is an arithmetic number, because the mean of its divisors is an integer number (2943788848).

Almost surely, 2^23012011021 is an apocalyptic number.

It is an amenable number.

23012011021 is a deficient number, since it is larger than the sum of its proper divisors (538299763).

23012011021 is an equidigital number, since it uses as much as digits as its factorization.

23012011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71331.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 23012011021 its reverse (12011021032), we get a palindrome (35023032053).

The spelling of 23012011021 in words is "twenty-three billion, twelve million, eleven thousand, twenty-one".