23121110100021 has 8 divisors (see below), whose sum is σ = 31822603148544. Its totient is φ = 14916845225760.

The previous prime is 23121110099993. The next prime is 23121110100047. The reversal of 23121110100021 is 12000101112132.

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

It is not a de Polignac number, because 23121110100021 - 2³³ = 23112520165429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121110100521) 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, 124307043456 + ... + 124307043641.

It is an arithmetic number, because the mean of its divisors is an integer number (3977825393568).

Almost surely, 2^{23121110100021} is an apocalyptic number.

It is an amenable number.

23121110100021 is a deficient number, since it is larger than the sum of its proper divisors (8701493048523).

23121110100021 is a wasteful number, since it uses less digits than its factorization.

23121110100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248614087131.

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

Adding to 23121110100021 its reverse (12000101112132), we get a palindrome (35121211212153).

The spelling of 23121110100021 in words is "twenty-three trillion, one hundred twenty-one billion, one hundred ten million, one hundred thousand, twenty-one".