20212120100999 has 2 divisors, whose sum is σ = 20212120101000. Its totient is φ = 20212120100998.

The previous prime is 20212120100993. The next prime is 20212120101119. The reversal of 20212120100999 is 99900102121202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212120100999 - 2⁸ = 20212120100743 is a prime.

It is a super-3 number, since 3×20212120100999³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212120100993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106060050499 + 10106060050500.

It is an arithmetic number, because the mean of its divisors is an integer number (10106060050500).

Almost surely, 2^{20212120100999} is an apocalyptic number.

20212120100999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212120100999 is an equidigital number, since it uses as much as digits as its factorization.

20212120100999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 20212120100999 in words is "twenty trillion, two hundred twelve billion, one hundred twenty million, one hundred thousand, nine hundred ninety-nine".