1231320241 has 16 divisors (see below), whose sum is σ = 1297739520. Its totient is φ = 1167016320.

The previous prime is 1231320239. The next prime is 1231320263. The reversal of 1231320241 is 1420231321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1231320241 - 2¹ = 1231320239 is a prime.

It is a super-2 number, since 2×1231320241² = 3032299071792596162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231320281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265555 + ... + 270151.

It is an arithmetic number, because the mean of its divisors is an integer number (81108720).

Almost surely, 2^1231320241 is an apocalyptic number.

It is an amenable number.

1231320241 is a deficient number, since it is larger than the sum of its proper divisors (66419279).

1231320241 is a wasteful number, since it uses less digits than its factorization.

1231320241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1231320241 is about 35090.1729975787. The cubic root of 1231320241 is about 1071.8244823956.

Adding to 1231320241 its reverse (1420231321), we get a palindrome (2651551562).

The spelling of 1231320241 in words is "one billion, two hundred thirty-one million, three hundred twenty thousand, two hundred forty-one".