1201109939 has 2 divisors, whose sum is σ = 1201109940. Its totient is φ = 1201109938.

The previous prime is 1201109929. The next prime is 1201109941. The reversal of 1201109939 is 9399011021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201109939 is a prime.

Together with 1201109941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201109899 and 1201109908.

It is not a weakly prime, because it can be changed into another prime (1201109929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600554969 + 600554970.

It is an arithmetic number, because the mean of its divisors is an integer number (600554970).

Almost surely, 2^1201109939 is an apocalyptic number.

1201109939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201109939 is an equidigital number, since it uses as much as digits as its factorization.

1201109939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 1201109939 is about 34657.0330380429. The cubic root of 1201109939 is about 1062.9861032719.

The spelling of 1201109939 in words is "one billion, two hundred one million, one hundred nine thousand, nine hundred thirty-nine".