1011212120999 has 8 divisors (see below), whose sum is σ = 1014773907840. Its totient is φ = 1007652074616.

The previous prime is 1011212120987. The next prime is 1011212121011. The reversal of 1011212120999 is 9990212121101.

It is an interprime number because it is at equal distance from previous prime (1011212120987) and next prime (1011212121011).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011212120999 - 2⁴ = 1011212120983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011212120959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734462 + ... + 1600580.

It is an arithmetic number, because the mean of its divisors is an integer number (126846738480).

Almost surely, 2^{1011212120999} is an apocalyptic number.

1011212120999 is a deficient number, since it is larger than the sum of its proper divisors (3561786841).

1011212120999 is an equidigital number, since it uses as much as digits as its factorization.

1011212120999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870229.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 1011212120999 in words is "one trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, nine hundred ninety-nine".