121229994911 has 2 divisors, whose sum is σ = 121229994912. Its totient is φ = 121229994910.

The previous prime is 121229994841. The next prime is 121229994917. The reversal of 121229994911 is 119499922121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121229994911 is a prime.

It is a super-2 number, since 2×121229994911² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121229994911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121229994917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60614997455 + 60614997456.

It is an arithmetic number, because the mean of its divisors is an integer number (60614997456).

Almost surely, 2^121229994911 is an apocalyptic number.

121229994911 is a deficient number, since it is larger than the sum of its proper divisors (1).

121229994911 is an equidigital number, since it uses as much as digits as its factorization.

121229994911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 50.

The spelling of 121229994911 in words is "one hundred twenty-one billion, two hundred twenty-nine million, nine hundred ninety-four thousand, nine hundred eleven".