1322002020 has 48 divisors (see below), whose sum is σ = 3703186368. Its totient is φ = 352383360.

The previous prime is 1322001997. The next prime is 1322002021. The reversal of 1322002020 is 202002231.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1322001987 and 1322002005.

It is not an unprimeable number, because it can be changed into a prime (1322002021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261315 + ... + 266325.

It is an arithmetic number, because the mean of its divisors is an integer number (77149716).

Almost surely, 2^1322002020 is an apocalyptic number.

1322002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322002020 is an abundant number, since it is smaller than the sum of its proper divisors (2381184348).

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

1322002020 is a wasteful number, since it uses less digits than its factorization.

1322002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9420 (or 9418 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 1322002020 is about 36359.3457036839. The cubic root of 1322002020 is about 1097.5156107735.

Adding to 1322002020 its reverse (202002231), we get a palindrome (1524004251).

The spelling of 1322002020 in words is "one billion, three hundred twenty-two million, two thousand, twenty".