20001211199 has 2 divisors, whose sum is σ = 20001211200. Its totient is φ = 20001211198.

The previous prime is 20001211193. The next prime is 20001211211. The reversal of 20001211199 is 99111210002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001211199 - 2⁴ = 20001211183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001211193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605599 + 10000605600.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605600).

Almost surely, 2^20001211199 is an apocalyptic number.

20001211199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001211199 is an equidigital number, since it uses as much as digits as its factorization.

20001211199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 20001211199 in words is "twenty billion, one million, two hundred eleven thousand, one hundred ninety-nine".