1321100422020 has 96 divisors (see below), whose sum is σ = 4110329059200. Its totient is φ = 352272972672.

The previous prime is 1321100421989. The next prime is 1321100422039. The reversal of 1321100422020 is 202240011231.

It is a happy number.

1321100422020 is a `hidden beast` number, since 1 + 321 + 100 + 4 + 220 + 20 = 666.

It is a super-2 number, since 2×1321100422020² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1321100421984 and 1321100422002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10754587 + ... + 10876733.

It is an arithmetic number, because the mean of its divisors is an integer number (42815927700).

Almost surely, 2^{1321100422020} is an apocalyptic number.

1321100422020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321100422020 is an abundant number, since it is smaller than the sum of its proper divisors (2789228637180).

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

1321100422020 is a wasteful number, since it uses less digits than its factorization.

1321100422020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142194 (or 142186 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1321100422020 its reverse (202240011231), we get a palindrome (1523340433251).

The spelling of 1321100422020 in words is "one trillion, three hundred twenty-one billion, one hundred million, four hundred twenty-two thousand, twenty".