21130122024 has 80 divisors (see below), whose sum is σ = 64564283520. Its totient is φ = 6403065120.

The previous prime is 21130122019. The next prime is 21130122043. The reversal of 21130122024 is 42022103112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21130121988 and 21130122006.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1475064 + ... + 1489319.

It is an arithmetic number, because the mean of its divisors is an integer number (807053544).

Almost surely, 2^21130122024 is an apocalyptic number.

21130122024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21130122024 is an abundant number, since it is smaller than the sum of its proper divisors (43434161496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21130122024 is a wasteful number, since it uses less digits than its factorization.

21130122024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964412 (or 2964399 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21130122024 its reverse (42022103112), we get a palindrome (63152225136).

The spelling of 21130122024 in words is "twenty-one billion, one hundred thirty million, one hundred twenty-two thousand, twenty-four".