121221032202131 has 4 divisors (see below), whose sum is σ = 121462028290512. Its totient is φ = 120980036113752.

The previous prime is 121221032202047. The next prime is 121221032202181. The reversal of 121221032202131 is 131202230122121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221032202131 is a prime.

It is a super-2 number, since 2×121221032202131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121221032202097 and 121221032202106.

It is not an unprimeable number, because it can be changed into a prime (121221032202181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120498043436 + ... + 120498044441.

It is an arithmetic number, because the mean of its divisors is an integer number (30365507072628).

Almost surely, 2^{121221032202131} is an apocalyptic number.

121221032202131 is a deficient number, since it is larger than the sum of its proper divisors (240996088381).

121221032202131 is an equidigital number, since it uses as much as digits as its factorization.

121221032202131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240996088380.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 121221032202131 its reverse (131202230122121), we get a palindrome (252423262324252).

The spelling of 121221032202131 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, thirty-two million, two hundred two thousand, one hundred thirty-one".