21409371222 has 16 divisors (see below), whose sum is σ = 43814527680. Its totient is φ = 6970492872.

The previous prime is 21409371163. The next prime is 21409371223. The reversal of 21409371222 is 22217390412.

It is a super-2 number, since 2×21409371222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21409371223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41490772 + ... + 41491287.

It is an arithmetic number, because the mean of its divisors is an integer number (2738407980).

Almost surely, 2^21409371222 is an apocalyptic number.

21409371222 is an abundant number, since it is smaller than the sum of its proper divisors (22405156458).

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

21409371222 is a wasteful number, since it uses less digits than its factorization.

21409371222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82982107.

The product of its (nonzero) digits is 12096, while the sum is 33.

The spelling of 21409371222 in words is "twenty-one billion, four hundred nine million, three hundred seventy-one thousand, two hundred twenty-two".