21422212004 has 12 divisors (see below), whose sum is σ = 37528464624. Its totient is φ = 10699793544.

The previous prime is 21422211997. The next prime is 21422212027. The reversal of 21422212004 is 40021222412.

It is a super-2 number, since 2×21422212004² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823854 + ... + 2831429.

It is an arithmetic number, because the mean of its divisors is an integer number (3127372052).

Almost surely, 2^21422212004 is an apocalyptic number.

It is an amenable number.

21422212004 is a deficient number, since it is larger than the sum of its proper divisors (16106252620).

21422212004 is a wasteful number, since it uses less digits than its factorization.

21422212004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656234 (or 5656232 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21422212004 its reverse (40021222412), we get a palindrome (61443434416).

The spelling of 21422212004 in words is "twenty-one billion, four hundred twenty-two million, two hundred twelve thousand, four".