1321213011320 has 16 divisors (see below), whose sum is σ = 2972729275560. Its totient is φ = 528485204512.

The previous prime is 1321213011311. The next prime is 1321213011407. The reversal of 1321213011320 is 231103121231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1321213011292 and 1321213011301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16515162602 + ... + 16515162681.

Almost surely, 2^{1321213011320} is an apocalyptic number.

1321213011320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321213011320 is an abundant number, since it is smaller than the sum of its proper divisors (1651516264240).

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

1321213011320 is a wasteful number, since it uses less digits than its factorization.

1321213011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33030325294 (or 33030325290 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321213011320 its reverse (231103121231), we get a palindrome (1552316132551).

The spelling of 1321213011320 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, eleven thousand, three hundred twenty".