21320021302122 has 16 divisors (see below), whose sum is σ = 43276461151392. Its totient is φ = 7000604009520.

The previous prime is 21320021302103. The next prime is 21320021302219. The reversal of 21320021302122 is 22120312002312.

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, 26517439029 + ... + 26517439832.

It is an arithmetic number, because the mean of its divisors is an integer number (2704778821962).

Almost surely, 2^{21320021302122} is an apocalyptic number.

21320021302122 is an abundant number, since it is smaller than the sum of its proper divisors (21956439849270).

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

21320021302122 is a wasteful number, since it uses less digits than its factorization.

21320021302122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53034878933.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21320021302122 its reverse (22120312002312), we get a palindrome (43440333304434).

The spelling of 21320021302122 in words is "twenty-one trillion, three hundred twenty billion, twenty-one million, three hundred two thousand, one hundred twenty-two".