21310223042 has 16 divisors (see below), whose sum is σ = 32290296192. Its totient is φ = 10547321280.

The previous prime is 21310223029. The next prime is 21310223071. The reversal of 21310223042 is 24032201312.

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, 51878 + ... + 212865.

It is an arithmetic number, because the mean of its divisors is an integer number (2018143512).

Almost surely, 2^21310223042 is an apocalyptic number.

21310223042 is a deficient number, since it is larger than the sum of its proper divisors (10980073150).

21310223042 is a wasteful number, since it uses less digits than its factorization.

21310223042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265153.

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

Adding to 21310223042 its reverse (24032201312), we get a palindrome (45342424354).

The spelling of 21310223042 in words is "twenty-one billion, three hundred ten million, two hundred twenty-three thousand, forty-two".