2121210199 has 4 divisors (see below), whose sum is σ = 2121401664. Its totient is φ = 2121018736.

The previous prime is 2121210187. The next prime is 2121210209. The reversal of 2121210199 is 9910121212.

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 2121210199 - 2¹³ = 2121202007 is a prime.

It is a super-3 number, since 3×2121210199³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121210599) 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, 78022 + ... + 101635.

It is an arithmetic number, because the mean of its divisors is an integer number (530350416).

Almost surely, 2^2121210199 is an apocalyptic number.

2121210199 is a deficient number, since it is larger than the sum of its proper divisors (191465).

2121210199 is a wasteful number, since it uses less digits than its factorization.

2121210199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191464.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 2121210199 is about 46056.5977792542. The cubic root of 2121210199 is about 1284.8760546018.

The spelling of 2121210199 in words is "two billion, one hundred twenty-one million, two hundred ten thousand, one hundred ninety-nine".