20101220219999 has 2 divisors, whose sum is σ = 20101220220000. Its totient is φ = 20101220219998.

The previous prime is 20101220219897. The next prime is 20101220220017. The reversal of 20101220219999 is 99991202210102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101220219999 - 2³⁶ = 20032500743263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101220219099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050610109999 + 10050610110000.

It is an arithmetic number, because the mean of its divisors is an integer number (10050610110000).

Almost surely, 2^{20101220219999} is an apocalyptic number.

20101220219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101220219999 is an equidigital number, since it uses as much as digits as its factorization.

20101220219999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 20101220219999 in words is "twenty trillion, one hundred one billion, two hundred twenty million, two hundred nineteen thousand, nine hundred ninety-nine".