223021131020 has 48 divisors (see below), whose sum is σ = 497044937088. Its totient is φ = 83766036480.

The previous prime is 223021131019. The next prime is 223021131029. The reversal of 223021131020 is 20131120322.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 223021131020.

It is not an unprimeable number, because it can be changed into a prime (223021131029) 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, 614417 + ... + 907496.

It is an arithmetic number, because the mean of its divisors is an integer number (10355102856).

Almost surely, 2^223021131020 is an apocalyptic number.

223021131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223021131020 is an abundant number, since it is smaller than the sum of its proper divisors (274023806068).

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

223021131020 is a wasteful number, since it uses less digits than its factorization.

223021131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522370 (or 1522368 counting only the distinct ones).

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

Adding to 223021131020 its reverse (20131120322), we get a palindrome (243152251342).

The spelling of 223021131020 in words is "two hundred twenty-three billion, twenty-one million, one hundred thirty-one thousand, twenty".