211121211220099 has 2 divisors, whose sum is σ = 211121211220100. Its totient is φ = 211121211220098.

The previous prime is 211121211220093. The next prime is 211121211220109. The reversal of 211121211220099 is 990022112121112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211121211220099 - 2²⁵ = 211121177665667 is a prime.

It is not a weakly prime, because it can be changed into another prime (211121211220093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560605610049 + 105560605610050.

It is an arithmetic number, because the mean of its divisors is an integer number (105560605610050).

Almost surely, 2^{211121211220099} is an apocalyptic number.

211121211220099 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121211220099 is an equidigital number, since it uses as much as digits as its factorization.

211121211220099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 211121211220099 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, ninety-nine".