201123304420 has 24 divisors (see below), whose sum is σ = 422498966400. Its totient is φ = 80422649952.

The previous prime is 201123304367. The next prime is 201123304471. The reversal of 201123304420 is 24403321102.

It is a junction number, because it is equal to n+sod(n) for n = 201123304391 and 201123304400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605100 + ... + 1725859.

It is an arithmetic number, because the mean of its divisors is an integer number (17604123600).

Almost surely, 2^201123304420 is an apocalyptic number.

201123304420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201123304420 is an abundant number, since it is smaller than the sum of its proper divisors (221375661980).

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

201123304420 is a wasteful number, since it uses less digits than its factorization.

201123304420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333987 (or 3333985 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 201123304420 its reverse (24403321102), we get a palindrome (225526625522).

The spelling of 201123304420 in words is "two hundred one billion, one hundred twenty-three million, three hundred four thousand, four hundred twenty".