1201210139 has 2 divisors, whose sum is σ = 1201210140. Its totient is φ = 1201210138.

The previous prime is 1201210097. The next prime is 1201210151. The reversal of 1201210139 is 9310121021.

It is a strong prime.

It is an emirp because it is prime and its reverse (9310121021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201210139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201210139.

It is not a weakly prime, because it can be changed into another prime (1201210739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600605069 + 600605070.

It is an arithmetic number, because the mean of its divisors is an integer number (600605070).

Almost surely, 2^1201210139 is an apocalyptic number.

1201210139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201210139 is an equidigital number, since it uses as much as digits as its factorization.

1201210139 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 1201210139 is about 34658.4786019237. The cubic root of 1201210139 is about 1063.0156615558.

The spelling of 1201210139 in words is "one billion, two hundred one million, two hundred ten thousand, one hundred thirty-nine".