21835390122 has 96 divisors (see below), whose sum is σ = 59214879360. Its totient is φ = 5661152640.

The previous prime is 21835390117. The next prime is 21835390127. The reversal of 21835390122 is 22109353812.

21835390122 is a `hidden beast` number, since 21 + 83 + 539 + 0 + 1 + 22 = 666.

It is an interprime number because it is at equal distance from previous prime (21835390117) and next prime (21835390127).

It is not an unprimeable number, because it can be changed into a prime (21835390127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16329 + ... + 209612.

It is an arithmetic number, because the mean of its divisors is an integer number (616821660).

Almost surely, 2^21835390122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21835390122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29607439680).

21835390122 is an abundant number, since it is smaller than the sum of its proper divisors (37379489238).

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

21835390122 is a wasteful number, since it uses less digits than its factorization.

21835390122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226028 (or 226025 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 21835390122 in words is "twenty-one billion, eight hundred thirty-five million, three hundred ninety thousand, one hundred twenty-two".