211121299 has 2 divisors, whose sum is σ = 211121300. Its totient is φ = 211121298.

The previous prime is 211121257. The next prime is 211121311. The reversal of 211121299 is 992121112.

211121299 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121299 - 2⁷ = 211121171 is a prime.

It is not a weakly prime, because it can be changed into another prime (211122299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560649 + 105560650.

It is an arithmetic number, because the mean of its divisors is an integer number (105560650).

Almost surely, 2^211121299 is an apocalyptic number.

211121299 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121299 is an equidigital number, since it uses as much as digits as its factorization.

211121299 is an evil number, because the sum of its binary digits is even.

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

The square root of 211121299 is about 14530.0137302069. The cubic root of 211121299 is about 595.4482407252.

The spelling of 211121299 in words is "two hundred eleven million, one hundred twenty-one thousand, two hundred ninety-nine".