23112111021 has 16 divisors (see below), whose sum is σ = 31609286400. Its totient is φ = 15014369088.

The previous prime is 23112111007. The next prime is 23112111023. The reversal of 23112111021 is 12011121132.

It is not a de Polignac number, because 23112111021 - 2¹³ = 23112102829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23112111023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325606 + ... + 390183.

It is an arithmetic number, because the mean of its divisors is an integer number (1975580400).

Almost surely, 2^23112111021 is an apocalyptic number.

It is an amenable number.

23112111021 is a deficient number, since it is larger than the sum of its proper divisors (8497175379).

23112111021 is a wasteful number, since it uses less digits than its factorization.

23112111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716068.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 23112111021 its reverse (12011121132), we get a palindrome (35123232153).

The spelling of 23112111021 in words is "twenty-three billion, one hundred twelve million, one hundred eleven thousand, twenty-one".