1201223431 has 2 divisors, whose sum is σ = 1201223432. Its totient is φ = 1201223430.

The previous prime is 1201223399. The next prime is 1201223437. The reversal of 1201223431 is 1343221021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1201223431 - 2⁵ = 1201223399 is a prime.

It is a super-2 number, since 2×1201223431² = 2885875462366823522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201223399 and 1201223408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201223437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600611715 + 600611716.

It is an arithmetic number, because the mean of its divisors is an integer number (600611716).

Almost surely, 2^1201223431 is an apocalyptic number.

1201223431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201223431 is an equidigital number, since it uses as much as digits as its factorization.

1201223431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1201223431 is about 34658.6703582235. The cubic root of 1201223431 is about 1063.0195824774.

Adding to 1201223431 its reverse (1343221021), we get a palindrome (2544444452).

The spelling of 1201223431 in words is "one billion, two hundred one million, two hundred twenty-three thousand, four hundred thirty-one".