1321130113220 has 24 divisors (see below), whose sum is σ = 2775365265624. Its totient is φ = 528263087616.

The previous prime is 1321130113187. The next prime is 1321130113243. The reversal of 1321130113220 is 223110311231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 427360297984 + 893769815236 = 653728^2 + 945394^2 .

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 = 1321130113192 and 1321130113201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11752517 + ... + 11864396.

It is an arithmetic number, because the mean of its divisors is an integer number (115640219401).

Almost surely, 2^{1321130113220} is an apocalyptic number.

1321130113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321130113220 is an abundant number, since it is smaller than the sum of its proper divisors (1454235152404).

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

1321130113220 is a wasteful number, since it uses less digits than its factorization.

1321130113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23619719 (or 23619717 counting only the distinct ones).

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

Adding to 1321130113220 its reverse (223110311231), we get a palindrome (1544240424451).

The spelling of 1321130113220 in words is "one trillion, three hundred twenty-one billion, one hundred thirty million, one hundred thirteen thousand, two hundred twenty".