203112232220 has 24 divisors (see below), whose sum is σ = 427661127600. Its totient is φ = 81030523392.

The previous prime is 203112232217. The next prime is 203112232231. The reversal of 203112232220 is 22232211302.

It is a happy number.

It is a super-2 number, since 2×203112232220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 203112232192 and 203112232201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13390325 + ... + 13405484.

It is an arithmetic number, because the mean of its divisors is an integer number (17819213650).

Almost surely, 2^203112232220 is an apocalyptic number.

203112232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203112232220 is an abundant number, since it is smaller than the sum of its proper divisors (224548895380).

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

203112232220 is a wasteful number, since it uses less digits than its factorization.

203112232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26796197 (or 26796195 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203112232220 its reverse (22232211302), we get a palindrome (225344443522).

The spelling of 203112232220 in words is "two hundred three billion, one hundred twelve million, two hundred thirty-two thousand, two hundred twenty".