21222211221002 has 64 divisors (see below), whose sum is σ = 36004655858688. Its totient is φ = 9294372864000.

The previous prime is 21222211220993. The next prime is 21222211221059. The reversal of 21222211221002 is 20012211222212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 846944858 + ... + 846969914.

It is an arithmetic number, because the mean of its divisors is an integer number (562572747792).

Almost surely, 2^{21222211221002} is an apocalyptic number.

21222211221002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222211221002 is a deficient number, since it is larger than the sum of its proper divisors (14782444637686).

21222211221002 is a wasteful number, since it uses less digits than its factorization.

21222211221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30495.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222211221002 its reverse (20012211222212), we get a palindrome (41234422443214).

The spelling of 21222211221002 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred twenty-one thousand, two".