21026109222 has 32 divisors (see below), whose sum is σ = 47718835200. Its totient is φ = 6859580904.

The previous prime is 21026109217. The next prime is 21026109229. The reversal of 21026109222 is 22290162012.

It is a happy number.

21026109222 is a `hidden beast` number, since 21 + 0 + 2 + 610 + 9 + 2 + 22 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026109229) 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 15 ways as a sum of consecutive naturals, for example, 4139722 + ... + 4144797.

It is an arithmetic number, because the mean of its divisors is an integer number (1491213600).

Almost surely, 2^21026109222 is an apocalyptic number.

21026109222 is an abundant number, since it is smaller than the sum of its proper divisors (26692725978).

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

21026109222 is a wasteful number, since it uses less digits than its factorization.

21026109222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284577 (or 8284571 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 21026109222 in words is "twenty-one billion, twenty-six million, one hundred nine thousand, two hundred twenty-two".