212100021019999 has 12 divisors (see below), whose sum is σ = 246728930040000. Its totient is φ = 181799771794368.

The previous prime is 212100021019979. The next prime is 212100021020003. The reversal of 212100021019999 is 999910120001212.

It is not a de Polignac number, because 212100021019999 - 2³⁷ = 211962582066527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100021019979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39955527 + ... + 44951575.

It is an arithmetic number, because the mean of its divisors is an integer number (20560744170000).

Almost surely, 2^{212100021019999} is an apocalyptic number.

212100021019999 is a deficient number, since it is larger than the sum of its proper divisors (34628909020001).

212100021019999 is an equidigital number, since it uses as much as digits as its factorization.

212100021019999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5862462 (or 5862455 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 212100021019999 in words is "two hundred twelve trillion, one hundred billion, twenty-one million, nineteen thousand, nine hundred ninety-nine".