201123231420 has 24 divisors (see below), whose sum is σ = 563145048144. Its totient is φ = 53632861696.

The previous prime is 201123231401. The next prime is 201123231437. The reversal of 201123231420 is 24132321102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1676026869 + ... + 1676026988.

It is an arithmetic number, because the mean of its divisors is an integer number (23464377006).

Almost surely, 2^201123231420 is an apocalyptic number.

201123231420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201123231420 is an abundant number, since it is smaller than the sum of its proper divisors (362021816724).

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

201123231420 is a wasteful number, since it uses less digits than its factorization.

201123231420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352053869 (or 3352053867 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 201123231420 its reverse (24132321102), we get a palindrome (225255552522).

The spelling of 201123231420 in words is "two hundred one billion, one hundred twenty-three million, two hundred thirty-one thousand, four hundred twenty".