21320323102122 has 128 divisors (see below), whose sum is σ = 50759600382720. Its totient is φ = 5916316999680.

The previous prime is 21320323102109. The next prime is 21320323102129. The reversal of 21320323102122 is 22120132302312.

It is a super-2 number, since 2×21320323102122² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320323102092 and 21320323102101.

It is not an unprimeable number, because it can be changed into a prime (21320323102129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11109018 + ... + 12886074.

It is an arithmetic number, because the mean of its divisors is an integer number (396559377990).

Almost surely, 2^{21320323102122} is an apocalyptic number.

21320323102122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21320323102122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25379800191360).

21320323102122 is an abundant number, since it is smaller than the sum of its proper divisors (29439277280598).

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

21320323102122 is a wasteful number, since it uses less digits than its factorization.

21320323102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777161 (or 1777127 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21320323102122 its reverse (22120132302312), we get a palindrome (43440455404434).

The spelling of 21320323102122 in words is "twenty-one trillion, three hundred twenty billion, three hundred twenty-three million, one hundred two thousand, one hundred twenty-two".