1201221431 has 2 divisors, whose sum is σ = 1201221432. Its totient is φ = 1201221430.

The previous prime is 1201221407. The next prime is 1201221433. The reversal of 1201221431 is 1341221021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201221431 is a prime.

It is a super-2 number, since 2×1201221431² = 2885865852587375522, which contains 22 as substring.

Together with 1201221433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201221433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600610715 + 600610716.

It is an arithmetic number, because the mean of its divisors is an integer number (600610716).

Almost surely, 2^1201221431 is an apocalyptic number.

1201221431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201221431 is an equidigital number, since it uses as much as digits as its factorization.

1201221431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1201221431 is about 34658.6415054024. The cubic root of 1201221431 is about 1063.0189925121.

Adding to 1201221431 its reverse (1341221021), we get a palindrome (2542442452).

The spelling of 1201221431 in words is "one billion, two hundred one million, two hundred twenty-one thousand, four hundred thirty-one".