1121203131 has 8 divisors (see below), whose sum is σ = 1515416400. Its totient is φ = 737229312.

The previous prime is 1121203099. The next prime is 1121203147. The reversal of 1121203131 is 1313021211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121203131 - 2⁵ = 1121203099 is a prime.

It is a super-2 number, since 2×1121203131² = 2514192921928406322, 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 1121203131.

It is not an unprimeable number, because it can be changed into a prime (1121243131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559606 + ... + 2560043.

It is an arithmetic number, because the mean of its divisors is an integer number (189427050).

Almost surely, 2^1121203131 is an apocalyptic number.

1121203131 is a deficient number, since it is larger than the sum of its proper divisors (394213269).

1121203131 is an equidigital number, since it uses as much as digits as its factorization.

1121203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119725.

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

The square root of 1121203131 is about 33484.3714440035. The cubic root of 1121203131 is about 1038.8705474519.

Adding to 1121203131 its reverse (1313021211), we get a palindrome (2434224342).

The spelling of 1121203131 in words is "one billion, one hundred twenty-one million, two hundred three thousand, one hundred thirty-one".