121246229491 has 2 divisors, whose sum is σ = 121246229492. Its totient is φ = 121246229490.

The previous prime is 121246229479. The next prime is 121246229509. The reversal of 121246229491 is 194922642121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121246229491 is a prime.

It is not a weakly prime, because it can be changed into another prime (121246229591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60623114745 + 60623114746.

It is an arithmetic number, because the mean of its divisors is an integer number (60623114746).

Almost surely, 2^121246229491 is an apocalyptic number.

121246229491 is a deficient number, since it is larger than the sum of its proper divisors (1).

121246229491 is an equidigital number, since it uses as much as digits as its factorization.

121246229491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The spelling of 121246229491 in words is "one hundred twenty-one billion, two hundred forty-six million, two hundred twenty-nine thousand, four hundred ninety-one".