1231133101 has 48 divisors (see below), whose sum is σ = 1494056448. Its totient is φ = 1004659200.

The previous prime is 1231133053. The next prime is 1231133159. The reversal of 1231133101 is 1013311321.

It is not a de Polignac number, because 1231133101 - 2⁹ = 1231132589 is a prime.

It is a super-3 number, since 3×1231133101³ (a number of 28 digits) contains 333 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 (1231133161) 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, 8986305 + ... + 8986441.

It is an arithmetic number, because the mean of its divisors is an integer number (31126176).

Almost surely, 2^1231133101 is an apocalyptic number.

1231133101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231133101 is a deficient number, since it is larger than the sum of its proper divisors (262923347).

1231133101 is a wasteful number, since it uses less digits than its factorization.

1231133101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1231133101 is about 35087.5063377265. The cubic root of 1231133101 is about 1071.7701798702.

Adding to 1231133101 its reverse (1013311321), we get a palindrome (2244444422).

It can be divided in two parts, 12 and 31133101, that added together give a palindrome (31133113).

The spelling of 1231133101 in words is "one billion, two hundred thirty-one million, one hundred thirty-three thousand, one hundred one".