211221121010199 has 4 divisors (see below), whose sum is σ = 281628161346936. Its totient is φ = 140814080673464.

The previous prime is 211221121010197. The next prime is 211221121010293. The reversal of 211221121010199 is 991010121122112.

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 211221121010199 - 2¹ = 211221121010197 is a prime.

It is a super-2 number, since 2×211221121010199² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221121010197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35203520168364 + ... + 35203520168369.

It is an arithmetic number, because the mean of its divisors is an integer number (70407040336734).

Almost surely, 2^{211221121010199} is an apocalyptic number.

211221121010199 is a deficient number, since it is larger than the sum of its proper divisors (70407040336737).

211221121010199 is an equidigital number, since it uses as much as digits as its factorization.

211221121010199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70407040336736.

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 211221121010199 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, ten thousand, one hundred ninety-nine".