20120102121199 has 4 divisors (see below), whose sum is σ = 21179054864440. Its totient is φ = 19061149377960.

The previous prime is 20120102121139. The next prime is 20120102121253. The reversal of 20120102121199 is 99112120102102.

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 20120102121199 - 2⁹ = 20120102120687 is a prime.

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 20120102121199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120102121139) 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, 529476371592 + ... + 529476371629.

It is an arithmetic number, because the mean of its divisors is an integer number (5294763716110).

Almost surely, 2^{20120102121199} is an apocalyptic number.

20120102121199 is a deficient number, since it is larger than the sum of its proper divisors (1058952743241).

20120102121199 is a wasteful number, since it uses less digits than its factorization.

20120102121199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058952743240.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 20120102121199 in words is "twenty trillion, one hundred twenty billion, one hundred two million, one hundred twenty-one thousand, one hundred ninety-nine".