121221102002 has 64 divisors (see below), whose sum is σ = 244300492800. Its totient is φ = 43566914880.

The previous prime is 121221101983. The next prime is 121221102011. The reversal of 121221102002 is 200201122121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3101699 + ... + 3140537.

It is an arithmetic number, because the mean of its divisors is an integer number (3817195200).

Almost surely, 2^121221102002 is an apocalyptic number.

121221102002 is an abundant number, since it is smaller than the sum of its proper divisors (123079390798).

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

121221102002 is a wasteful number, since it uses less digits than its factorization.

121221102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40431.

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

Adding to 121221102002 its reverse (200201122121), we get a palindrome (321422224123).

The spelling of 121221102002 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, two".