1201233231 has 48 divisors (see below), whose sum is σ = 1951616160. Its totient is φ = 705576960.

The previous prime is 1201233223. The next prime is 1201233233. The reversal of 1201233231 is 1323321021.

1201233231 is a `hidden beast` number, since 1 + 201 + 233 + 231 = 666.

It is not a de Polignac number, because 1201233231 - 2³ = 1201233223 is a prime.

It is a super-2 number, since 2×1201233231² = 2885922550517398722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201233233) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1292575 + ... + 1293503.

It is an arithmetic number, because the mean of its divisors is an integer number (40658670).

Almost surely, 2^1201233231 is an apocalyptic number.

1201233231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201233231 is a deficient number, since it is larger than the sum of its proper divisors (750382929).

1201233231 is a wasteful number, since it uses less digits than its factorization.

1201233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1201233231 is about 34658.8117366998. The cubic root of 1201233231 is about 1063.0224732978.

Adding to 1201233231 its reverse (1323321021), we get a palindrome (2524554252).

It can be divided in two parts, 1201 and 233231, that added together give a palindrome (234432).

The spelling of 1201233231 in words is "one billion, two hundred one million, two hundred thirty-three thousand, two hundred thirty-one".