1201221231 has 12 divisors (see below), whose sum is σ = 1863118872. Its totient is φ = 686412048.

The previous prime is 1201221227. The next prime is 1201221233. The reversal of 1201221231 is 1321221021.

It is not a de Polignac number, because 1201221231 - 2² = 1201221227 is a prime.

It is a super-2 number, since 2×1201221231² = 2885864891610310722, 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 1201221231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201221233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4085640 + ... + 4085933.

It is an arithmetic number, because the mean of its divisors is an integer number (155259906).

Almost surely, 2^1201221231 is an apocalyptic number.

1201221231 is a deficient number, since it is larger than the sum of its proper divisors (661897641).

1201221231 is an equidigital number, since it uses as much as digits as its factorization.

1201221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8171590 (or 8171583 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1201221231 is about 34658.6386201189. The cubic root of 1201221231 is about 1063.0189335155.

Adding to 1201221231 its reverse (1321221021), we get a palindrome (2522442252).

The spelling of 1201221231 in words is "one billion, two hundred one million, two hundred twenty-one thousand, two hundred thirty-one".