21352045122 has 64 divisors (see below), whose sum is σ = 49111920000. Its totient is φ = 6868177344.

The previous prime is 21352045109. The next prime is 21352045123. The reversal of 21352045122 is 22154025312.

21352045122 is a `hidden beast` number, since 2 + 13 + 520 + 4 + 5 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21352045123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5164168 + ... + 5168300.

It is an arithmetic number, because the mean of its divisors is an integer number (767373750).

Almost surely, 2^21352045122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21352045122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24555960000).

21352045122 is an abundant number, since it is smaller than the sum of its proper divisors (27759874878).

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

21352045122 is a wasteful number, since it uses less digits than its factorization.

21352045122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7472 (or 7466 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 21352045122 in words is "twenty-one billion, three hundred fifty-two million, forty-five thousand, one hundred twenty-two".