21043425222 has 24 divisors (see below), whose sum is σ = 45671783976. Its totient is φ = 7002521856.

The previous prime is 21043425211. The next prime is 21043425229. The reversal of 21043425222 is 22252434012.

21043425222 is a `hidden beast` number, since 2 + 1 + 0 + 434 + 2 + 5 + 222 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043425229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 985243 + ... + 1006374.

It is an arithmetic number, because the mean of its divisors is an integer number (1902990999).

Almost surely, 2^21043425222 is an apocalyptic number.

21043425222 is an abundant number, since it is smaller than the sum of its proper divisors (24628358754).

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

21043425222 is a wasteful number, since it uses less digits than its factorization.

21043425222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992212 (or 1992209 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 21043425222 its reverse (22252434012), we get a palindrome (43295859234).

The spelling of 21043425222 in words is "twenty-one billion, forty-three million, four hundred twenty-five thousand, two hundred twenty-two".