121533343291 has 2 divisors, whose sum is σ = 121533343292. Its totient is φ = 121533343290.

The previous prime is 121533343277. The next prime is 121533343319. The reversal of 121533343291 is 192343335121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121533343291 - 2¹⁵ = 121533310523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121533343291.

It is not a weakly prime, because it can be changed into another prime (121533343391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60766671645 + 60766671646.

It is an arithmetic number, because the mean of its divisors is an integer number (60766671646).

Almost surely, 2^121533343291 is an apocalyptic number.

121533343291 is a deficient number, since it is larger than the sum of its proper divisors (1).

121533343291 is an equidigital number, since it uses as much as digits as its factorization.

121533343291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The spelling of 121533343291 in words is "one hundred twenty-one billion, five hundred thirty-three million, three hundred forty-three thousand, two hundred ninety-one".