203112312321020 has 12 divisors (see below), whose sum is σ = 426535855874184. Its totient is φ = 81244924928400.

The previous prime is 203112312321013. The next prime is 203112312321041. The reversal of 203112312321020 is 20123213211302.

It is a super-2 number, since 2×203112312321020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5077807808006 + ... + 5077807808045.

It is an arithmetic number, because the mean of its divisors is an integer number (35544654656182).

Almost surely, 2^{203112312321020} is an apocalyptic number.

203112312321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203112312321020 is an abundant number, since it is smaller than the sum of its proper divisors (223423543553164).

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

203112312321020 is a wasteful number, since it uses less digits than its factorization.

203112312321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155615616060 (or 10155615616058 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 203112312321020 its reverse (20123213211302), we get a palindrome (223235525532322).

The spelling of 203112312321020 in words is "two hundred three trillion, one hundred twelve billion, three hundred twelve million, three hundred twenty-one thousand, twenty".