21112221002 has 8 divisors (see below), whose sum is σ = 31672070976. Its totient is φ = 10554864012.

The previous prime is 21112220993. The next prime is 21112221023. The reversal of 21112221002 is 20012221112.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 601928 + ... + 636035.

It is an arithmetic number, because the mean of its divisors is an integer number (3959008872).

Almost surely, 2^21112221002 is an apocalyptic number.

21112221002 is a deficient number, since it is larger than the sum of its proper divisors (10559849974).

21112221002 is a wasteful number, since it uses less digits than its factorization.

21112221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246492.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21112221002 its reverse (20012221112), we get a palindrome (41124442114).

The spelling of 21112221002 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, two".