21222233002 has 24 divisors (see below), whose sum is σ = 33026051916. Its totient is φ = 10227458304.

The previous prime is 21222232981. The next prime is 21222233003. The reversal of 21222233002 is 20033222212.

It can be written as a sum of positive squares in 6 ways, for example, as 6505874281 + 14716358721 = 80659^2 + 121311^2 .

It is not an unprimeable number, because it can be changed into a prime (21222233003) 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, 986788 + ... + 1008064.

Almost surely, 2^21222233002 is an apocalyptic number.

21222233002 is a deficient number, since it is larger than the sum of its proper divisors (11803818914).

21222233002 is a wasteful number, since it uses less digits than its factorization.

21222233002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21930 (or 21901 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21222233002 its reverse (20033222212), we get a palindrome (41255455214).

The spelling of 21222233002 in words is "twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, two".