21303212042 has 16 divisors (see below), whose sum is σ = 36730893312. Its totient is φ = 9077172720.

The previous prime is 21303212011. The next prime is 21303212089. The reversal of 21303212042 is 24021230312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4395434 + ... + 4400277.

It is an arithmetic number, because the mean of its divisors is an integer number (2295680832).

Almost surely, 2^21303212042 is an apocalyptic number.

21303212042 is a deficient number, since it is larger than the sum of its proper divisors (15427681270).

21303212042 is a wasteful number, since it uses less digits than its factorization.

21303212042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8795893.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21303212042 its reverse (24021230312), we get a palindrome (45324442354).

The spelling of 21303212042 in words is "twenty-one billion, three hundred three million, two hundred twelve thousand, forty-two".