203105031212112 has 120 divisors (see below), whose sum is σ = 553795560753120. Its totient is φ = 64133916514560.

The previous prime is 203105031212053. The next prime is 203105031212119. The reversal of 203105031212112 is 211212130501302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203105031212119) 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, 250174939 + ... + 250985477.

It is an arithmetic number, because the mean of its divisors is an integer number (4614963006276).

Almost surely, 2^{203105031212112} 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 203105031212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276897780376560).

203105031212112 is an abundant number, since it is smaller than the sum of its proper divisors (350690529541008).

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

203105031212112 is a wasteful number, since it uses less digits than its factorization.

203105031212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825049 (or 825024 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 203105031212112 its reverse (211212130501302), we get a palindrome (414317161713414).

The spelling of 203105031212112 in words is "two hundred three trillion, one hundred five billion, thirty-one million, two hundred twelve thousand, one hundred twelve".