121221221002 has 16 divisors (see below), whose sum is σ = 207879857280. Its totient is φ = 51933939408.

The previous prime is 121221220961. The next prime is 121221221021. The reversal of 121221221002 is 200122122121.

It is a happy number.

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, 1459177 + ... + 1540012.

It is an arithmetic number, because the mean of its divisors is an integer number (12992491080).

Almost surely, 2^121221221002 is an apocalyptic number.

121221221002 is a deficient number, since it is larger than the sum of its proper divisors (86658636278).

121221221002 is a wasteful number, since it uses less digits than its factorization.

121221221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002085.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121221221002 its reverse (200122122121), we get a palindrome (321343343123).

The spelling of 121221221002 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-one thousand, two".