211120139 has 2 divisors, whose sum is σ = 211120140. Its totient is φ = 211120138.

The previous prime is 211120109. The next prime is 211120157. The reversal of 211120139 is 931021112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211120139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211120139.

It is not a weakly prime, because it can be changed into another prime (211120109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560069 + 105560070.

It is an arithmetic number, because the mean of its divisors is an integer number (105560070).

Almost surely, 2^211120139 is an apocalyptic number.

211120139 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120139 is an equidigital number, since it uses as much as digits as its factorization.

211120139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 211120139 is about 14529.9738127775. The cubic root of 211120139 is about 595.4471501653.

The spelling of 211120139 in words is "two hundred eleven million, one hundred twenty thousand, one hundred thirty-nine".