1231203141 has 12 divisors (see below), whose sum is σ = 2032462432. Its totient is φ = 703544616.

The previous prime is 1231203137. The next prime is 1231203217. The reversal of 1231203141 is 1413021321.

It is not a de Polignac number, because 1231203141 - 2² = 1231203137 is a prime.

It is a super-2 number, since 2×1231203141² = 3031722348816531762, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231203131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9771391 + ... + 9771516.

Almost surely, 2^1231203141 is an apocalyptic number.

It is an amenable number.

1231203141 is a deficient number, since it is larger than the sum of its proper divisors (801259291).

1231203141 is a wasteful number, since it uses less digits than its factorization.

1231203141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19542920 (or 19542917 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1231203141 is about 35088.5043995893. The cubic root of 1231203141 is about 1071.7905040631.

Adding to 1231203141 its reverse (1413021321), we get a palindrome (2644224462).

The spelling of 1231203141 in words is "one billion, two hundred thirty-one million, two hundred three thousand, one hundred forty-one".