21234101022 has 48 divisors (see below), whose sum is σ = 50125903920. Its totient is φ = 6661673856.

The previous prime is 21234101017. The next prime is 21234101041. The reversal of 21234101022 is 22010143212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21234100986 and 21234101004.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 664713 + ... + 695924.

It is an arithmetic number, because the mean of its divisors is an integer number (1044289665).

Almost surely, 2^21234101022 is an apocalyptic number.

21234101022 is an abundant number, since it is smaller than the sum of its proper divisors (28891802898).

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

21234101022 is a wasteful number, since it uses less digits than its factorization.

21234101022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360682 (or 1360659 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21234101022 its reverse (22010143212), we get a palindrome (43244244234).

The spelling of 21234101022 in words is "twenty-one billion, two hundred thirty-four million, one hundred one thousand, twenty-two".