1301111231 has 4 divisors (see below), whose sum is σ = 1486984272. Its totient is φ = 1115238192.

The previous prime is 1301111221. The next prime is 1301111239. The reversal of 1301111231 is 1321111031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321111031 = 6389 ⋅206779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1301111231 is a prime.

It is a super-2 number, since 2×1301111231² = 3385780870868670722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301111239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92936510 + ... + 92936523.

It is an arithmetic number, because the mean of its divisors is an integer number (371746068).

Almost surely, 2^1301111231 is an apocalyptic number.

1301111231 is a deficient number, since it is larger than the sum of its proper divisors (185873041).

1301111231 is an equidigital number, since it uses as much as digits as its factorization.

1301111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185873040.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1301111231 is about 36070.9194642998. The cubic root of 1301111231 is about 1091.7037661912.

Adding to 1301111231 its reverse (1321111031), we get a palindrome (2622222262).

It can be divided in two parts, 13011 and 11231, that added together give a palindrome (24242).

The spelling of 1301111231 in words is "one billion, three hundred one million, one hundred eleven thousand, two hundred thirty-one".