1131421203 has 40 divisors (see below), whose sum is σ = 1886740416. Its totient is φ = 669740400.

The previous prime is 1131421189. The next prime is 1131421217. The reversal of 1131421203 is 3021241311.

1131421203 is a `hidden beast` number, since 11 + 31 + 421 + 203 = 666.

It is an interprime number because it is at equal distance from previous prime (1131421189) and next prime (1131421217).

It is not a de Polignac number, because 1131421203 - 2⁵ = 1131421171 is a prime.

It is a super-2 number, since 2×1131421203² = 2560227877195934418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131428203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23548 + ... + 53078.

Almost surely, 2^1131421203 is an apocalyptic number.

1131421203 is a deficient number, since it is larger than the sum of its proper divisors (755319213).

1131421203 is a wasteful number, since it uses less digits than its factorization.

1131421203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29597 (or 29588 counting only the distinct ones).

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

The square root of 1131421203 is about 33636.6051051529. The cubic root of 1131421203 is about 1042.0169202224.

Adding to 1131421203 its reverse (3021241311), we get a palindrome (4152662514).

The spelling of 1131421203 in words is "one billion, one hundred thirty-one million, four hundred twenty-one thousand, two hundred three".