21233124042 has 32 divisors (see below), whose sum is σ = 46204372032. Its totient is φ = 6465913344.

The previous prime is 21233124023. The next prime is 21233124043. The reversal of 21233124042 is 24042133212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21233124043) 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, 1395628 + ... + 1410759.

It is an arithmetic number, because the mean of its divisors is an integer number (1443886626).

Almost surely, 2^21233124042 is an apocalyptic number.

21233124042 is an abundant number, since it is smaller than the sum of its proper divisors (24971247990).

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

21233124042 is a wasteful number, since it uses less digits than its factorization.

21233124042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806502.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21233124042 its reverse (24042133212), we get a palindrome (45275257254).

The spelling of 21233124042 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-four thousand, forty-two".