1231120203 has 8 divisors (see below), whose sum is σ = 1685858448. Its totient is φ = 798564384.

The previous prime is 1231120201. The next prime is 1231120237. The reversal of 1231120203 is 3020211321.

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

It is not a de Polignac number, because 1231120203 - 2¹ = 1231120201 is a prime.

It is a super-2 number, since 2×1231120203² = 3031313908469522418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231120201) 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, 5545476 + ... + 5545697.

It is an arithmetic number, because the mean of its divisors is an integer number (210732306).

Almost surely, 2^1231120203 is an apocalyptic number.

1231120203 is a deficient number, since it is larger than the sum of its proper divisors (454738245).

1231120203 is a wasteful number, since it uses less digits than its factorization.

1231120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091213.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1231120203 is about 35087.3225396296. The cubic root of 1231120203 is about 1071.7664370471.

Adding to 1231120203 its reverse (3020211321), we get a palindrome (4251331524).

The spelling of 1231120203 in words is "one billion, two hundred thirty-one million, one hundred twenty thousand, two hundred three".