20101212100999 has 2 divisors, whose sum is σ = 20101212101000. Its totient is φ = 20101212100998.

The previous prime is 20101212100967. The next prime is 20101212101051. The reversal of 20101212100999 is 99900121210102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20101212100999 - 2⁵ = 20101212100967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101212104999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050606050499 + 10050606050500.

It is an arithmetic number, because the mean of its divisors is an integer number (10050606050500).

Almost surely, 2^{20101212100999} is an apocalyptic number.

20101212100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101212100999 is an equidigital number, since it uses as much as digits as its factorization.

20101212100999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 20101212100999 in words is "twenty trillion, one hundred one billion, two hundred twelve million, one hundred thousand, nine hundred ninety-nine".