1431022121 has 2 divisors, whose sum is σ = 1431022122. Its totient is φ = 1431022120.

The previous prime is 1431022079. The next prime is 1431022163. The reversal of 1431022121 is 1212201341.

It is a balanced prime because it is at equal distance from previous prime (1431022079) and next prime (1431022163).

It can be written as a sum of positive squares in only one way, i.e., 1039417600 + 391604521 = 32240^2 + 19789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1431022121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1431022121.

It is not a weakly prime, because it can be changed into another prime (1431022421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715511060 + 715511061.

It is an arithmetic number, because the mean of its divisors is an integer number (715511061).

Almost surely, 2^1431022121 is an apocalyptic number.

It is an amenable number.

1431022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431022121 is an equidigital number, since it uses as much as digits as its factorization.

1431022121 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1431022121 is about 37828.8530225277. The cubic root of 1431022121 is about 1126.8915328609.

Adding to 1431022121 its reverse (1212201341), we get a palindrome (2643223462).

The spelling of 1431022121 in words is "one billion, four hundred thirty-one million, twenty-two thousand, one hundred twenty-one".