1321232221430 has 128 divisors (see below), whose sum is σ = 2743932672000. Its totient is φ = 453005844480.

The previous prime is 1321232221391. The next prime is 1321232221459. The reversal of 1321232221430 is 341222321231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321232221430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 506411966 + ... + 506414574.

It is an arithmetic number, because the mean of its divisors is an integer number (21436974000).

Almost surely, 2^{1321232221430} is an apocalyptic number.

1321232221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321232221430 is an abundant number, since it is smaller than the sum of its proper divisors (1422700450570).

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

1321232221430 is a wasteful number, since it uses less digits than its factorization.

1321232221430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1321232221430 its reverse (341222321231), we get a palindrome (1662454542661).

The spelling of 1321232221430 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-two million, two hundred twenty-one thousand, four hundred thirty".