1212120099999 has 40 divisors (see below), whose sum is σ = 1896608812032. Its totient is φ = 770006880720.

The previous prime is 1212120099979. The next prime is 1212120100019. The reversal of 1212120099999 is 9999900212121.

It is an interprime number because it is at equal distance from previous prime (1212120099979) and next prime (1212120100019).

It is not a de Polignac number, because 1212120099999 - 2⁷ = 1212120099871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212120099929) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 746967 + ... + 1726904.

Almost surely, 2^{1212120099999} is an apocalyptic number.

1212120099999 is a deficient number, since it is larger than the sum of its proper divisors (684488712033).

1212120099999 is a wasteful number, since it uses less digits than its factorization.

1212120099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474169 (or 2474160 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 54.

The spelling of 1212120099999 in words is "one trillion, two hundred twelve billion, one hundred twenty million, ninety-nine thousand, nine hundred ninety-nine".