203121229992 has 16 divisors (see below), whose sum is σ = 507803075040. Its totient is φ = 67707076656.

The previous prime is 203121229991. The next prime is 203121230009. The reversal of 203121229992 is 299922121302.

203121229992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (203121229991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4231692268 + ... + 4231692315.

It is an arithmetic number, because the mean of its divisors is an integer number (31737692190).

Almost surely, 2^203121229992 is an apocalyptic number.

It is an amenable number.

203121229992 is an abundant number, since it is smaller than the sum of its proper divisors (304681845048).

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

203121229992 is a wasteful number, since it uses less digits than its factorization.

203121229992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8463384592 (or 8463384588 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The spelling of 203121229992 in words is "two hundred three billion, one hundred twenty-one million, two hundred twenty-nine thousand, nine hundred ninety-two".