11231322020 has 12 divisors (see below), whose sum is σ = 23585776284. Its totient is φ = 4492528800.

The previous prime is 11231321999. The next prime is 11231322023. The reversal of 11231322020 is 2022313211.

It can be written as a sum of positive squares in 2 ways, for example, as 3433725604 + 7797596416 = 58598^2 + 88304^2 .

It is a super-2 number, since 2×11231322020² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11231322020.

It is not an unprimeable number, because it can be changed into a prime (11231322023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280783031 + ... + 280783070.

It is an arithmetic number, because the mean of its divisors is an integer number (1965481357).

Almost surely, 2^11231322020 is an apocalyptic number.

11231322020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11231322020 is an abundant number, since it is smaller than the sum of its proper divisors (12354454264).

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

11231322020 is a wasteful number, since it uses less digits than its factorization.

11231322020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561566110 (or 561566108 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 11231322020 its reverse (2022313211), we get a palindrome (13253635231).

The spelling of 11231322020 in words is "eleven billion, two hundred thirty-one million, three hundred twenty-two thousand, twenty".