20012122199 has 4 divisors (see below), whose sum is σ = 20657674560. Its totient is φ = 19366569840.

The previous prime is 20012122177. The next prime is 20012122223. The reversal of 20012122199 is 99122121002.

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 20012122199 - 2¹² = 20012118103 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 (20012122129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322776134 + ... + 322776195.

It is an arithmetic number, because the mean of its divisors is an integer number (5164418640).

Almost surely, 2^20012122199 is an apocalyptic number.

20012122199 is a deficient number, since it is larger than the sum of its proper divisors (645552361).

20012122199 is an equidigital number, since it uses as much as digits as its factorization.

20012122199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645552360.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 20012122199 in words is "twenty billion, twelve million, one hundred twenty-two thousand, one hundred ninety-nine".