1321421143356 has 72 divisors (see below), whose sum is σ = 3464312167680. Its totient is φ = 440430497712.

The previous prime is 1321421143333. The next prime is 1321421143363. The reversal of 1321421143356 is 6533411241231.

1321421143356 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 4 + 211 + 433 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1321421143356.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10746535 + ... + 10868801.

Almost surely, 2^{1321421143356} is an apocalyptic number.

It is an amenable number.

1321421143356 is an abundant number, since it is smaller than the sum of its proper divisors (2142891024324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321421143356 is a wasteful number, since it uses less digits than its factorization.

1321421143356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133405 (or 133391 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 1321421143356 its reverse (6533411241231), we get a palindrome (7854832384587).

The spelling of 1321421143356 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, one hundred forty-three thousand, three hundred fifty-six".