201123242340 has 48 divisors (see below), whose sum is σ = 563824524480. Its totient is φ = 53568155520.

The previous prime is 201123242329. The next prime is 201123242363. The reversal of 201123242340 is 43242321102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201123242340.

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, 1972006 + ... + 2071485.

It is an arithmetic number, because the mean of its divisors is an integer number (11746344260).

Almost surely, 2^201123242340 is an apocalyptic number.

201123242340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201123242340 is an abundant number, since it is smaller than the sum of its proper divisors (362701282140).

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

201123242340 is a wasteful number, since it uses less digits than its factorization.

201123242340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044332 (or 4044330 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 201123242340 its reverse (43242321102), we get a palindrome (244365563442).

The spelling of 201123242340 in words is "two hundred one billion, one hundred twenty-three million, two hundred forty-two thousand, three hundred forty".