1321320402234 has 48 divisors (see below), whose sum is σ = 3272077748160. Its totient is φ = 377492797440.

The previous prime is 1321320402217. The next prime is 1321320402263. The reversal of 1321320402234 is 4322040231231.

1321320402234 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 3 + 20 + 402 + 234 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1321320402198 and 1321320402207.

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, 1401837 + ... + 2146575.

It is an arithmetic number, because the mean of its divisors is an integer number (68168286420).

Almost surely, 2^{1321320402234} is an apocalyptic number.

1321320402234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1321320402234 is an abundant number, since it is smaller than the sum of its proper divisors (1950757345926).

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

1321320402234 is a wasteful number, since it uses less digits than its factorization.

1321320402234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758835 (or 758832 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 1321320402234 its reverse (4322040231231), we get a palindrome (5643360633465).

The spelling of 1321320402234 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, four hundred two thousand, two hundred thirty-four".