201221001302130 has 48 divisors (see below), whose sum is σ = 523222154320320. Its totient is φ = 53654056661664.

The previous prime is 201221001302129. The next prime is 201221001302143. The reversal of 201221001302130 is 31203100122102.

201221001302130 is a `hidden beast` number, since 20 + 1 + 2 + 210 + 0 + 1 + 302 + 130 = 666.

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

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, 100608790 + ... + 102589329.

It is an arithmetic number, because the mean of its divisors is an integer number (10900461548340).

Almost surely, 2^{201221001302130} is an apocalyptic number.

201221001302130 is an abundant number, since it is smaller than the sum of its proper divisors (322001153018190).

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

201221001302130 is a wasteful number, since it uses less digits than its factorization.

201221001302130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203209135 (or 203209132 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201221001302130 its reverse (31203100122102), we get a palindrome (232424101424232).

The spelling of 201221001302130 in words is "two hundred one trillion, two hundred twenty-one billion, one million, three hundred two thousand, one hundred thirty".