221121100221010 has 32 divisors (see below), whose sum is σ = 434203082280000. Its totient is φ = 80407367415360.

The previous prime is 221121100220941. The next prime is 221121100221053. The reversal of 221121100221010 is 10122001121122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26355616 + ... + 33717364.

It is an arithmetic number, because the mean of its divisors is an integer number (13568846321250).

Almost surely, 2^{221121100221010} is an apocalyptic number.

221121100221010 is a deficient number, since it is larger than the sum of its proper divisors (213081982058990).

221121100221010 is a wasteful number, since it uses less digits than its factorization.

221121100221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7634826.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221121100221010 its reverse (10122001121122), we get a palindrome (231243101342132).

The spelling of 221121100221010 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, ten".