121202130021 has 16 divisors (see below), whose sum is σ = 192718915584. Its totient is φ = 66247126704.

The previous prime is 121202130001. The next prime is 121202130029. The reversal of 121202130021 is 120031202121.

It is not a de Polignac number, because 121202130021 - 2³⁵ = 86842391653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202130029) 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 15 ways as a sum of consecutive naturals, for example, 125467561 + ... + 125468526.

It is an arithmetic number, because the mean of its divisors is an integer number (12044932224).

Almost surely, 2^121202130021 is an apocalyptic number.

It is an amenable number.

121202130021 is a deficient number, since it is larger than the sum of its proper divisors (71516785563).

121202130021 is a wasteful number, since it uses less digits than its factorization.

121202130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250936120.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121202130021 its reverse (120031202121), we get a palindrome (241233332142).

The spelling of 121202130021 in words is "one hundred twenty-one billion, two hundred two million, one hundred thirty thousand, twenty-one".