213211099 has 2 divisors, whose sum is σ = 213211100. Its totient is φ = 213211098.

The previous prime is 213211067. The next prime is 213211139. The reversal of 213211099 is 990112312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213211099 - 2⁵ = 213211067 is a prime.

It is not a weakly prime, because it can be changed into another prime (213211039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106605549 + 106605550.

It is an arithmetic number, because the mean of its divisors is an integer number (106605550).

Almost surely, 2^213211099 is an apocalyptic number.

213211099 is a deficient number, since it is larger than the sum of its proper divisors (1).

213211099 is an equidigital number, since it uses as much as digits as its factorization.

213211099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 213211099 is about 14601.7498608900. The cubic root of 213211099 is about 597.4064899209.

It can be divided in two parts, 2132 and 11099, that added together give a palindrome (13231).

The spelling of 213211099 in words is "two hundred thirteen million, two hundred eleven thousand, ninety-nine".