1200013231 has 4 divisors (see below), whose sum is σ = 1200084552. Its totient is φ = 1199941912.

The previous prime is 1200013223. The next prime is 1200013261. The reversal of 1200013231 is 1323100021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1200013231 - 2³ = 1200013223 is a prime.

It is a super-2 number, since 2×1200013231² = 2880063509150118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200013211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5136 + ... + 49258.

It is an arithmetic number, because the mean of its divisors is an integer number (300021138).

Almost surely, 2^1200013231 is an apocalyptic number.

1200013231 is a deficient number, since it is larger than the sum of its proper divisors (71321).

1200013231 is an equidigital number, since it uses as much as digits as its factorization.

1200013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71320.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1200013231 is about 34641.2071238864. The cubic root of 1200013231 is about 1062.6624747337.

Adding to 1200013231 its reverse (1323100021), we get a palindrome (2523113252).

The spelling of 1200013231 in words is "one billion, two hundred million, thirteen thousand, two hundred thirty-one".