121334435491 has 2 divisors, whose sum is σ = 121334435492. Its totient is φ = 121334435490.

The previous prime is 121334435471. The next prime is 121334435501. The reversal of 121334435491 is 194534433121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121334435491 - 2¹¹ = 121334433443 is a prime.

It is a super-2 number, since 2×121334435491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121334435471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60667217745 + 60667217746.

It is an arithmetic number, because the mean of its divisors is an integer number (60667217746).

Almost surely, 2^121334435491 is an apocalyptic number.

121334435491 is a deficient number, since it is larger than the sum of its proper divisors (1).

121334435491 is an equidigital number, since it uses as much as digits as its factorization.

121334435491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The spelling of 121334435491 in words is "one hundred twenty-one billion, three hundred thirty-four million, four hundred thirty-five thousand, four hundred ninety-one".