1321213133020 has 24 divisors (see below), whose sum is σ = 3026779177968. Its totient is φ = 480441139200.

The previous prime is 1321213132997. The next prime is 1321213133027. The reversal of 1321213133020 is 203313121231.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1321213132982 and 1321213133000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321213133027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3002756901 + ... + 3002757340.

It is an arithmetic number, because the mean of its divisors is an integer number (126115799082).

Almost surely, 2^{1321213133020} is an apocalyptic number.

1321213133020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321213133020 is an abundant number, since it is smaller than the sum of its proper divisors (1705566044948).

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

1321213133020 is a wasteful number, since it uses less digits than its factorization.

1321213133020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6005514261 (or 6005514259 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1321213133020 its reverse (203313121231), we get a palindrome (1524526254251).

The spelling of 1321213133020 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, one hundred thirty-three thousand, twenty".