11131223020 has 24 divisors (see below), whose sum is σ = 23426293968. Its totient is φ = 4442827200.

The previous prime is 11131223009. The next prime is 11131223021. The reversal of 11131223020 is 2032213111.

It is a junction number, because it is equal to n+sod(n) for n = 11131222985 and 11131223003.

It is not an unprimeable number, because it can be changed into a prime (11131223021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594426 + ... + 612865.

It is an arithmetic number, because the mean of its divisors is an integer number (976095582).

Almost surely, 2^11131223020 is an apocalyptic number.

11131223020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11131223020 is an abundant number, since it is smaller than the sum of its proper divisors (12295070948).

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

11131223020 is a wasteful number, since it uses less digits than its factorization.

11131223020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207761 (or 1207759 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11131223020 its reverse (2032213111), we get a palindrome (13163436131).

Subtracting from 11131223020 its reverse (2032213111), we obtain a palindrome (9099009909).

The spelling of 11131223020 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-three thousand, twenty".