121321421311 has 2 divisors, whose sum is σ = 121321421312. Its totient is φ = 121321421310.

The previous prime is 121321421303. The next prime is 121321421327. The reversal of 121321421311 is 113124123121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121321421311 - 2³ = 121321421303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121321421371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60660710655 + 60660710656.

It is an arithmetic number, because the mean of its divisors is an integer number (60660710656).

Almost surely, 2^121321421311 is an apocalyptic number.

121321421311 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321421311 is an equidigital number, since it uses as much as digits as its factorization.

121321421311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

Adding to 121321421311 its reverse (113124123121), we get a palindrome (234445544432).

The spelling of 121321421311 in words is "one hundred twenty-one billion, three hundred twenty-one million, four hundred twenty-one thousand, three hundred eleven".