121210000999 has 2 divisors, whose sum is σ = 121210001000. Its totient is φ = 121210000998.

The previous prime is 121210000997. The next prime is 121210001027. The reversal of 121210000999 is 999000012121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121210000999 - 2¹ = 121210000997 is a prime.

Together with 121210000997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121210000993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605000499 + 60605000500.

It is an arithmetic number, because the mean of its divisors is an integer number (60605000500).

Almost surely, 2^121210000999 is an apocalyptic number.

121210000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121210000999 is an equidigital number, since it uses as much as digits as its factorization.

121210000999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 121210000999 in words is "one hundred twenty-one billion, two hundred ten million, nine hundred ninety-nine", and thus it is an aban number.