21222210002 has 24 divisors (see below), whose sum is σ = 36987208128. Its totient is φ = 8946108720.

The previous prime is 21222209959. The next prime is 21222210011. The reversal of 21222210002 is 20001222212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151598 + ... + 255785.

It is an arithmetic number, because the mean of its divisors is an integer number (1541133672).

Almost surely, 2^21222210002 is an apocalyptic number.

21222210002 is a deficient number, since it is larger than the sum of its proper divisors (15764998126).

21222210002 is an equidigital number, since it uses as much as digits as its factorization.

21222210002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407514 (or 407453 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21222210002 its reverse (20001222212), we get a palindrome (41223432214).

The spelling of 21222210002 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten thousand, two".