1211000010199 has 4 divisors (see below), whose sum is σ = 1384000011664. Its totient is φ = 1038000008736.

The previous prime is 1211000010193. The next prime is 1211000010251. The reversal of 1211000010199 is 9910100001121.

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 1211000010199 - 2¹¹ = 1211000008151 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 (1211000010193) 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, 86500000722 + ... + 86500000735.

It is an arithmetic number, because the mean of its divisors is an integer number (346000002916).

Almost surely, 2^{1211000010199} is an apocalyptic number.

1211000010199 is a deficient number, since it is larger than the sum of its proper divisors (173000001465).

1211000010199 is an equidigital number, since it uses as much as digits as its factorization.

1211000010199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173000001464.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 1211000010199 in words is "one trillion, two hundred eleven billion, ten thousand, one hundred ninety-nine".