20012121232199 has 24 divisors (see below), whose sum is σ = 20824716039120. Its totient is φ = 19223627484672.

The previous prime is 20012121232193. The next prime is 20012121232223. The reversal of 20012121232199 is 99123212121002.

It is not a de Polignac number, because 20012121232199 - 2²⁰ = 20012120183623 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 (20012121232193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35437097 + ... + 35997389.

It is an arithmetic number, because the mean of its divisors is an integer number (867696501630).

Almost surely, 2^{20012121232199} is an apocalyptic number.

20012121232199 is a deficient number, since it is larger than the sum of its proper divisors (812594806921).

20012121232199 is an frugal number, since it uses more digits than its factorization.

20012121232199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560607 (or 560528 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 20012121232199 in words is "twenty trillion, twelve billion, one hundred twenty-one million, two hundred thirty-two thousand, one hundred ninety-nine".