20102121211199 has 2 divisors, whose sum is σ = 20102121211200. Its totient is φ = 20102121211198.

The previous prime is 20102121211189. The next prime is 20102121211231. The reversal of 20102121211199 is 99111212120102.

It is an a-pointer prime, because the next prime (20102121211231) can be obtained adding 20102121211199 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102121211199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102121211189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051060605599 + 10051060605600.

It is an arithmetic number, because the mean of its divisors is an integer number (10051060605600).

Almost surely, 2^{20102121211199} is an apocalyptic number.

20102121211199 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102121211199 is an equidigital number, since it uses as much as digits as its factorization.

20102121211199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 20102121211199 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred ninety-nine".