1431233204221 has 2 divisors, whose sum is σ = 1431233204222. Its totient is φ = 1431233204220.

The previous prime is 1431233204131. The next prime is 1431233204227. The reversal of 1431233204221 is 1224023321341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1264882608900 + 166350595321 = 1124670^2 + 407861^2 .

It is an emirp because it is prime and its reverse (1224023321341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1431233204221 - 2²¹ = 1431231107069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1431233204221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431233204227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 715616602110 + 715616602111.

It is an arithmetic number, because the mean of its divisors is an integer number (715616602111).

Almost surely, 2^{1431233204221} is an apocalyptic number.

It is an amenable number.

1431233204221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431233204221 is an equidigital number, since it uses as much as digits as its factorization.

1431233204221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1431233204221 its reverse (1224023321341), we get a palindrome (2655256525562).

The spelling of 1431233204221 in words is "one trillion, four hundred thirty-one billion, two hundred thirty-three million, two hundred four thousand, two hundred twenty-one".