1321020010332 has 72 divisors (see below), whose sum is σ = 3731661893232. Its totient is φ = 390545452800.

The previous prime is 1321020010319. The next prime is 1321020010367. The reversal of 1321020010332 is 2330100201231.

1321020010332 is a `hidden beast` number, since 1 + 321 + 0 + 2 + 0 + 0 + 10 + 332 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 40665583 + ... + 40698054.

It is an arithmetic number, because the mean of its divisors is an integer number (51828637406).

Almost surely, 2^{1321020010332} is an apocalyptic number.

1321020010332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321020010332 is an abundant number, since it is smaller than the sum of its proper divisors (2410641882900).

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

1321020010332 is a wasteful number, since it uses less digits than its factorization.

1321020010332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81363699 (or 81363694 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1321020010332 its reverse (2330100201231), we get a palindrome (3651120211563).

The spelling of 1321020010332 in words is "one trillion, three hundred twenty-one billion, twenty million, ten thousand, three hundred thirty-two".