201321812460 has 48 divisors (see below), whose sum is σ = 563722419456. Its totient is φ = 53683783872.

The previous prime is 201321812459. The next prime is 201321812501. The reversal of 201321812460 is 64218123102.

It is a super-2 number, since 2×201321812460² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202019 + ... + 2291621.

It is an arithmetic number, because the mean of its divisors is an integer number (11744217072).

Almost surely, 2^201321812460 is an apocalyptic number.

201321812460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201321812460 is an abundant number, since it is smaller than the sum of its proper divisors (362400606996).

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

201321812460 is a wasteful number, since it uses less digits than its factorization.

201321812460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127062 (or 127060 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 201321812460 its reverse (64218123102), we get a palindrome (265539935562).

The spelling of 201321812460 in words is "two hundred one billion, three hundred twenty-one million, eight hundred twelve thousand, four hundred sixty".