1212100320199 has 4 divisors (see below), whose sum is σ = 1251200330560. Its totient is φ = 1173000309840.

The previous prime is 1212100320149. The next prime is 1212100320203. The reversal of 1212100320199 is 9910230012121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212100320199 - 2⁹ = 1212100319687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 39100010329 = 1212100320199 / (1 + 2 + 1 + 2 + 1 + 0 + 0 + 3 + 2 + 0 + 1 + 9 + 9).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212100320199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212100320149) 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 3 ways as a sum of consecutive naturals, for example, 19550005134 + ... + 19550005195.

It is an arithmetic number, because the mean of its divisors is an integer number (312800082640).

Almost surely, 2^{1212100320199} is an apocalyptic number.

1212100320199 is a deficient number, since it is larger than the sum of its proper divisors (39100010361).

1212100320199 is an equidigital number, since it uses as much as digits as its factorization.

1212100320199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39100010360.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 1212100320199 in words is "one trillion, two hundred twelve billion, one hundred million, three hundred twenty thousand, one hundred ninety-nine".