21221110002002 has 16 divisors (see below), whose sum is σ = 32514210214272. Its totient is φ = 10383113204880.

The previous prime is 21221110001953. The next prime is 21221110002011. The reversal of 21221110002002 is 20020001112212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17736149 + ... + 18894792.

It is an arithmetic number, because the mean of its divisors is an integer number (2032138138392).

Almost surely, 2^{21221110002002} is an apocalyptic number.

21221110002002 is a deficient number, since it is larger than the sum of its proper divisors (11293100212270).

21221110002002 is a wasteful number, since it uses less digits than its factorization.

21221110002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36637153.

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

Adding to 21221110002002 its reverse (20020001112212), we get a palindrome (41241111114214).

The spelling of 21221110002002 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, two thousand, two".