1231220301 has 16 divisors (see below), whose sum is σ = 1667248128. Its totient is φ = 808038000.

The previous prime is 1231220267. The next prime is 1231220303. The reversal of 1231220301 is 1030221321.

It is not a de Polignac number, because 1231220301 - 2¹⁵ = 1231187533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231220303) 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, 150876 + ... + 158826.

It is an arithmetic number, because the mean of its divisors is an integer number (104203008).

Almost surely, 2^1231220301 is an apocalyptic number.

It is an amenable number.

1231220301 is a deficient number, since it is larger than the sum of its proper divisors (436027827).

1231220301 is an equidigital number, since it uses as much as digits as its factorization.

1231220301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8752.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1231220301 is about 35088.7489232660. The cubic root of 1231220301 is about 1071.7954834308.

Adding to 1231220301 its reverse (1030221321), we get a palindrome (2261441622).

The spelling of 1231220301 in words is "one billion, two hundred thirty-one million, two hundred twenty thousand, three hundred one".