21221210211002 has 16 divisors (see below), whose sum is σ = 32281973280000. Its totient is φ = 10460569326480.

The previous prime is 21221210210999. The next prime is 21221210211083. The reversal of 21221210211002 is 20011201212212.

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, 1689602 + ... + 6730317.

It is an arithmetic number, because the mean of its divisors is an integer number (2017623330000).

Almost surely, 2^{21221210211002} is an apocalyptic number.

21221210211002 is a deficient number, since it is larger than the sum of its proper divisors (11060763068998).

21221210211002 is a wasteful number, since it uses less digits than its factorization.

21221210211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8437741.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21221210211002 its reverse (20011201212212), we get a palindrome (41232411423214).

The spelling of 21221210211002 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, two".