1203211131 has 36 divisors (see below), whose sum is σ = 1702484472. Its totient is φ = 755796608.

The previous prime is 1203211129. The next prime is 1203211147. The reversal of 1203211131 is 1311123021.

It is a happy number.

It is not a de Polignac number, because 1203211131 - 2¹ = 1203211129 is a prime.

It is a super-2 number, since 2×1203211131² = 2895434051524598322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1203211131.

It is not an unprimeable number, because it can be changed into a prime (1203211111) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8782495 + ... + 8782631.

Almost surely, 2^1203211131 is an apocalyptic number.

1203211131 is a deficient number, since it is larger than the sum of its proper divisors (499273341).

1203211131 is an equidigital number, since it uses as much as digits as its factorization.

1203211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1203211131 is about 34687.3338698724. Note that the first 3 decimals coincide. The cubic root of 1203211131 is about 1063.6055960306.

Adding to 1203211131 its reverse (1311123021), we get a palindrome (2514334152).

The spelling of 1203211131 in words is "one billion, two hundred three million, two hundred eleven thousand, one hundred thirty-one".