121212110993 has 2 divisors, whose sum is σ = 121212110994. Its totient is φ = 121212110992.

The previous prime is 121212110989. The next prime is 121212111047. The reversal of 121212110993 is 399011212121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114997626769 + 6214484224 = 339113^2 + 78832^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212110993 - 2² = 121212110989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121212110923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606055496 + 60606055497.

It is an arithmetic number, because the mean of its divisors is an integer number (60606055497).

Almost surely, 2^121212110993 is an apocalyptic number.

It is an amenable number.

121212110993 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212110993 is an equidigital number, since it uses as much as digits as its factorization.

121212110993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 121212110993 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, nine hundred ninety-three".