1242110231 has 2 divisors, whose sum is σ = 1242110232. Its totient is φ = 1242110230.

The previous prime is 1242110227. The next prime is 1242110251. The reversal of 1242110231 is 1320112421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1320112421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242110231 - 2² = 1242110227 is a prime.

It is a super-2 number, since 2×1242110231² = 3085675651909746722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242110251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621055115 + 621055116.

It is an arithmetic number, because the mean of its divisors is an integer number (621055116).

Almost surely, 2^1242110231 is an apocalyptic number.

1242110231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242110231 is an equidigital number, since it uses as much as digits as its factorization.

1242110231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1242110231 is about 35243.5842530240. The cubic root of 1242110231 is about 1074.9461609236.

Adding to 1242110231 its reverse (1320112421), we get a palindrome (2562222652).

The spelling of 1242110231 in words is "one billion, two hundred forty-two million, one hundred ten thousand, two hundred thirty-one".