1201333231 has 4 divisors (see below), whose sum is σ = 1372952272. Its totient is φ = 1029714192.

The previous prime is 1201333229. The next prime is 1201333253. The reversal of 1201333231 is 1323331021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1323331021 = 211 ⋅6271711.

It is a cyclic number.

It is not a de Polignac number, because 1201333231 - 2¹ = 1201333229 is a prime.

It is a super-2 number, since 2×1201333231² = 2886403063809798722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201333199 and 1201333208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201333031) 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, 85809510 + ... + 85809523.

It is an arithmetic number, because the mean of its divisors is an integer number (343238068).

Almost surely, 2^1201333231 is an apocalyptic number.

1201333231 is a deficient number, since it is larger than the sum of its proper divisors (171619041).

1201333231 is an equidigital number, since it uses as much as digits as its factorization.

1201333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171619040.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1201333231 is about 34660.2543412480. The cubic root of 1201333231 is about 1063.0519705663.

Adding to 1201333231 its reverse (1323331021), we get a palindrome (2524664252).

The spelling of 1201333231 in words is "one billion, two hundred one million, three hundred thirty-three thousand, two hundred thirty-one".