1432221221 has 2 divisors, whose sum is σ = 1432221222. Its totient is φ = 1432221220.

The previous prime is 1432221157. The next prime is 1432221229. The reversal of 1432221221 is 1221222341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777628996 + 654592225 = 27886^2 + 25585^2 .

It is an emirp because it is prime and its reverse (1221222341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1432221221 - 2⁶ = 1432221157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1432221193 and 1432221202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1432221229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 716110610 + 716110611.

It is an arithmetic number, because the mean of its divisors is an integer number (716110611).

Almost surely, 2^1432221221 is an apocalyptic number.

It is an amenable number.

1432221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1432221221 is an equidigital number, since it uses as much as digits as its factorization.

1432221221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 1432221221 is about 37844.6987172576. The cubic root of 1432221221 is about 1127.2061980159.

Adding to 1432221221 its reverse (1221222341), we get a palindrome (2653443562).

The spelling of 1432221221 in words is "one billion, four hundred thirty-two million, two hundred twenty-one thousand, two hundred twenty-one".