1431213403221 has 64 divisors (see below), whose sum is σ = 2494088755200. Its totient is φ = 794106633600.

The previous prime is 1431213403201. The next prime is 1431213403229. The reversal of 1431213403221 is 1223043121341.

1431213403221 is a `hidden beast` number, since 1 + 4 + 31 + 2 + 1 + 3 + 403 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1431213403221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431213403229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1197370 + ... + 2072708.

It is an arithmetic number, because the mean of its divisors is an integer number (38970136800).

Almost surely, 2^{1431213403221} is an apocalyptic number.

It is an amenable number.

1431213403221 is a deficient number, since it is larger than the sum of its proper divisors (1062875351979).

1431213403221 is a wasteful number, since it uses less digits than its factorization.

1431213403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875607 (or 875601 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 1431213403221 its reverse (1223043121341), we get a palindrome (2654256524562).

The spelling of 1431213403221 in words is "one trillion, four hundred thirty-one billion, two hundred thirteen million, four hundred three thousand, two hundred twenty-one".