23121221101 has 16 divisors (see below), whose sum is σ = 25446643200. Its totient is φ = 20833441200.

The previous prime is 23121221083. The next prime is 23121221147. The reversal of 23121221101 is 10112212132.

It is not a de Polignac number, because 23121221101 - 2¹⁵ = 23121188333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121221401) 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, 1228480 + ... + 1247158.

It is an arithmetic number, because the mean of its divisors is an integer number (1590415200).

Almost surely, 2^23121221101 is an apocalyptic number.

It is an amenable number.

23121221101 is a deficient number, since it is larger than the sum of its proper divisors (2325422099).

23121221101 is a wasteful number, since it uses less digits than its factorization.

23121221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19680.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 23121221101 its reverse (10112212132), we get a palindrome (33233433233).

The spelling of 23121221101 in words is "twenty-three billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred one".