203312021130 has 192 divisors, whose sum is σ = 547622000640. Its totient is φ = 52294629888.

The previous prime is 203312021089. The next prime is 203312021131. The reversal of 203312021130 is 31120213302.

203312021130 is a `hidden beast` number, since 2 + 0 + 331 + 202 + 1 + 130 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (203312021131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 235587079 + ... + 235587941.

It is an arithmetic number, because the mean of its divisors is an integer number (2852197920).

Almost surely, 2^203312021130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203312021130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273811000320).

203312021130 is an abundant number, since it is smaller than the sum of its proper divisors (344309979510).

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

203312021130 is a wasteful number, since it uses less digits than its factorization.

203312021130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445 (or 1442 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 203312021130 its reverse (31120213302), we get a palindrome (234432234432).

The spelling of 203312021130 in words is "two hundred three billion, three hundred twelve million, twenty-one thousand, one hundred thirty".