320121203130 has 24 divisors (see below), whose sum is σ = 832315128372. Its totient is φ = 85365654144.

The previous prime is 320121203123. The next prime is 320121203131. The reversal of 320121203130 is 31302121023.

320121203130 is a `hidden beast` number, since 320 + 1 + 212 + 0 + 3 + 130 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 312728126841 + 7393076289 = 559221^2 + 85983^2 .

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 (320121203131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1778451039 + ... + 1778451218.

Almost surely, 2^320121203130 is an apocalyptic number.

320121203130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320121203130 is an abundant number, since it is smaller than the sum of its proper divisors (512193925242).

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

320121203130 is a wasteful number, since it uses less digits than its factorization.

320121203130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556902270 (or 3556902267 counting only the distinct ones).

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

Adding to 320121203130 its reverse (31302121023), we get a palindrome (351423324153).

The spelling of 320121203130 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred three thousand, one hundred thirty".