21221001201102 has 64 divisors (see below), whose sum is σ = 46118326425600. Its totient is φ = 6485001575040.

The previous prime is 21221001201053. The next prime is 21221001201167. The reversal of 21221001201102 is 20110210012212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156803088 + ... + 156938364.

It is an arithmetic number, because the mean of its divisors is an integer number (720598850400).

Almost surely, 2^{21221001201102} is an apocalyptic number.

21221001201102 is an abundant number, since it is smaller than the sum of its proper divisors (24897325224498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221001201102 is a wasteful number, since it uses less digits than its factorization.

21221001201102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179721.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21221001201102 its reverse (20110210012212), we get a palindrome (41331211213314).

The spelling of 21221001201102 in words is "twenty-one trillion, two hundred twenty-one billion, one million, two hundred one thousand, one hundred two".