21101230023 has 8 divisors (see below), whose sum is σ = 28314177648. Its totient is φ = 13977884544.

The previous prime is 21101230019. The next prime is 21101230063. The reversal of 21101230023 is 32003210112.

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

It is not a de Polignac number, because 21101230023 - 2² = 21101230019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101229984 and 21101230011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101230013) 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, 22399986 + ... + 22400927.

It is an arithmetic number, because the mean of its divisors is an integer number (3539272206).

Almost surely, 2^21101230023 is an apocalyptic number.

21101230023 is a deficient number, since it is larger than the sum of its proper divisors (7212947625).

21101230023 is a wasteful number, since it uses less digits than its factorization.

21101230023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44801073.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21101230023 its reverse (32003210112), we get a palindrome (53104440135).

The spelling of 21101230023 in words is "twenty-one billion, one hundred one million, two hundred thirty thousand, twenty-three".