212121012199 has 4 divisors (see below), whose sum is σ = 212721921936. Its totient is φ = 211520102464.

The previous prime is 212121012163. The next prime is 212121012221. The reversal of 212121012199 is 991210121212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212121012199 - 2⁷ = 212121012071 is a prime.

It is a super-3 number, since 3×212121012199³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212121012199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121012109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300454339 + ... + 300455044.

It is an arithmetic number, because the mean of its divisors is an integer number (53180480484).

Almost surely, 2^212121012199 is an apocalyptic number.

212121012199 is a deficient number, since it is larger than the sum of its proper divisors (600909737).

212121012199 is an equidigital number, since it uses as much as digits as its factorization.

212121012199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600909736.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 212121012199 in words is "two hundred twelve billion, one hundred twenty-one million, twelve thousand, one hundred ninety-nine".