222131320020 has 72 divisors (see below), whose sum is σ = 673857999360. Its totient is φ = 59229773760.

The previous prime is 222131320007. The next prime is 222131320027. The reversal of 222131320020 is 20023131222.

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 = 222131319975 and 222131320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222131320027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2254141 + ... + 2350619.

It is an arithmetic number, because the mean of its divisors is an integer number (9359138880).

Almost surely, 2^222131320020 is an apocalyptic number.

222131320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222131320020 is an abundant number, since it is smaller than the sum of its proper divisors (451726679340).

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

222131320020 is a wasteful number, since it uses less digits than its factorization.

222131320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109285 (or 109280 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 222131320020 its reverse (20023131222), we get a palindrome (242154451242).

The spelling of 222131320020 in words is "two hundred twenty-two billion, one hundred thirty-one million, three hundred twenty thousand, twenty".