21522010042 has 32 divisors (see below), whose sum is σ = 35533983744. Its totient is φ = 9716112000.

The previous prime is 21522010031. The next prime is 21522010063. The reversal of 21522010042 is 24001022512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188542 + ... + 280342.

It is an arithmetic number, because the mean of its divisors is an integer number (1110436992).

Almost surely, 2^21522010042 is an apocalyptic number.

21522010042 is a deficient number, since it is larger than the sum of its proper divisors (14011973702).

21522010042 is a wasteful number, since it uses less digits than its factorization.

21522010042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92014.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 21522010042 its reverse (24001022512), we get a palindrome (45523032554).

The spelling of 21522010042 in words is "twenty-one billion, five hundred twenty-two million, ten thousand, forty-two".