121221201002 has 16 divisors (see below), whose sum is σ = 198385912800. Its totient is φ = 55093893840.

The previous prime is 121221201001. The next prime is 121221201029. The reversal of 121221201002 is 200102122121.

It is not an unprimeable number, because it can be changed into a prime (121221201001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143852 + ... + 512967.

It is an arithmetic number, because the mean of its divisors is an integer number (12399119550).

Almost surely, 2^121221201002 is an apocalyptic number.

121221201002 is a deficient number, since it is larger than the sum of its proper divisors (77164711798).

121221201002 is a wasteful number, since it uses less digits than its factorization.

121221201002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665221.

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

Adding to 121221201002 its reverse (200102122121), we get a palindrome (321323323123).

It can be divided in two parts, 121221 and 201002, that added together give a palindrome (322223).

The spelling of 121221201002 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, two".