212121221200199 has 16 divisors (see below), whose sum is σ = 221574030573504. Its totient is φ = 202687700371200.

The previous prime is 212121221200181. The next prime is 212121221200249. The reversal of 212121221200199 is 991002122121212.

It is a cyclic number.

It is not a de Polignac number, because 212121221200199 - 2¹⁶ = 212121221134663 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 (212121221200099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84063089 + ... + 86549669.

It is an arithmetic number, because the mean of its divisors is an integer number (13848376910844).

Almost surely, 2^{212121221200199} is an apocalyptic number.

212121221200199 is a deficient number, since it is larger than the sum of its proper divisors (9452809373305).

212121221200199 is a wasteful number, since it uses less digits than its factorization.

212121221200199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490458.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 212121221200199 in words is "two hundred twelve trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, one hundred ninety-nine".