121221131302 has 4 divisors (see below), whose sum is σ = 181831696956. Its totient is φ = 60610565650.

The previous prime is 121221131293. The next prime is 121221131309. The reversal of 121221131302 is 203131122121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 203131122121 = 523 ⋅388396027.

It is a self number, because there is not a number n which added to its sum of digits gives 121221131302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221131309) 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 as a sum of consecutive naturals, namely, 30305282824 + ... + 30305282827.

It is an arithmetic number, because the mean of its divisors is an integer number (45457924239).

Almost surely, 2^121221131302 is an apocalyptic number.

121221131302 is a deficient number, since it is larger than the sum of its proper divisors (60610565654).

121221131302 is an equidigital number, since it uses as much as digits as its factorization.

121221131302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610565653.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 121221131302 its reverse (203131122121), we get a palindrome (324352253423).

The spelling of 121221131302 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred two".