203231022012 has 72 divisors (see below), whose sum is σ = 521911340496. Its totient is φ = 66665896704.

The previous prime is 203231021971. The next prime is 203231022023. The reversal of 203231022012 is 210220132302.

203231022012 is a `hidden beast` number, since 203 + 231 + 0 + 220 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2401768 + ... + 2484944.

It is an arithmetic number, because the mean of its divisors is an integer number (7248768618).

Almost surely, 2^203231022012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203231022012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260955670248).

203231022012 is an abundant number, since it is smaller than the sum of its proper divisors (318680318484).

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

203231022012 is a wasteful number, since it uses less digits than its factorization.

203231022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84267 (or 84262 counting only the distinct ones).

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

Adding to 203231022012 its reverse (210220132302), we get a palindrome (413451154314).

The spelling of 203231022012 in words is "two hundred three billion, two hundred thirty-one million, twenty-two thousand, twelve".