121202002221 has 16 divisors (see below), whose sum is σ = 164043909120. Its totient is φ = 79586598960.

The previous prime is 121202002219. The next prime is 121202002241. The reversal of 121202002221 is 122200202121.

It is not a de Polignac number, because 121202002221 - 2¹ = 121202002219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121202002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202002241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652861 + ... + 817698.

It is an arithmetic number, because the mean of its divisors is an integer number (10252744320).

Almost surely, 2^121202002221 is an apocalyptic number.

It is an amenable number.

121202002221 is a deficient number, since it is larger than the sum of its proper divisors (42841906899).

121202002221 is a wasteful number, since it uses less digits than its factorization.

121202002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470976.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121202002221 its reverse (122200202121), we get a palindrome (243402204342).

The spelling of 121202002221 in words is "one hundred twenty-one billion, two hundred two million, two thousand, two hundred twenty-one".