1201205231 has 4 divisors (see below), whose sum is σ = 1206497112. Its totient is φ = 1195913352.

The previous prime is 1201205209. The next prime is 1201205263. The reversal of 1201205231 is 1325021021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201205231 - 2³⁰ = 127463407 is a prime.

It is a super-2 number, since 2×1201205231² = 2885788013963526722, 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 (1201285231) 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, 2645600 + ... + 2646053.

It is an arithmetic number, because the mean of its divisors is an integer number (301624278).

Almost surely, 2^1201205231 is an apocalyptic number.

1201205231 is a deficient number, since it is larger than the sum of its proper divisors (5291881).

1201205231 is an equidigital number, since it uses as much as digits as its factorization.

1201205231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291880.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1201205231 is about 34658.4077966660. The cubic root of 1201205231 is about 1063.0142137692.

Adding to 1201205231 its reverse (1325021021), we get a palindrome (2526226252).

The spelling of 1201205231 in words is "one billion, two hundred one million, two hundred five thousand, two hundred thirty-one".