21020324122 has 16 divisors (see below), whose sum is σ = 36120853440. Its totient is φ = 8987207328.

The previous prime is 21020324119. The next prime is 21020324167. The reversal of 21020324122 is 22142302012.

It is a self number, because there is not a number n which added to its sum of digits gives 21020324122.

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, 1785843 + ... + 1797574.

It is an arithmetic number, because the mean of its divisors is an integer number (2257553340).

Almost surely, 2^21020324122 is an apocalyptic number.

21020324122 is a deficient number, since it is larger than the sum of its proper divisors (15100529318).

21020324122 is a wasteful number, since it uses less digits than its factorization.

21020324122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583845.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21020324122 its reverse (22142302012), we get a palindrome (43162626134).

The spelling of 21020324122 in words is "twenty-one billion, twenty million, three hundred twenty-four thousand, one hundred twenty-two".