1201121239 has 2 divisors, whose sum is σ = 1201121240. Its totient is φ = 1201121238.

The previous prime is 1201121231. The next prime is 1201121329. The reversal of 1201121239 is 9321211021.

Together with next prime (1201121329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201121239 - 2³ = 1201121231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201121231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600560619 + 600560620.

It is an arithmetic number, because the mean of its divisors is an integer number (600560620).

Almost surely, 2^1201121239 is an apocalyptic number.

1201121239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201121239 is an equidigital number, since it uses as much as digits as its factorization.

1201121239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1201121239 is about 34657.1960637326. The cubic root of 1201121239 is about 1062.9894367734.

The spelling of 1201121239 in words is "one billion, two hundred one million, one hundred twenty-one thousand, two hundred thirty-nine".