211005121139 has 2 divisors, whose sum is σ = 211005121140. Its totient is φ = 211005121138.

The previous prime is 211005121087. The next prime is 211005121177. The reversal of 211005121139 is 931121500112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211005121139 - 2²⁰ = 211004072563 is a prime.

It is a super-2 number, since 2×211005121139² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211005121939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105502560569 + 105502560570.

It is an arithmetic number, because the mean of its divisors is an integer number (105502560570).

Almost surely, 2^211005121139 is an apocalyptic number.

211005121139 is a deficient number, since it is larger than the sum of its proper divisors (1).

211005121139 is an equidigital number, since it uses as much as digits as its factorization.

211005121139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 26.

The spelling of 211005121139 in words is "two hundred eleven billion, five million, one hundred twenty-one thousand, one hundred thirty-nine".