201123223421 has 8 divisors (see below), whose sum is σ = 203205702840. Its totient is φ = 199040928768.

The previous prime is 201123223363. The next prime is 201123223423. The reversal of 201123223421 is 124322321102.

It can be written as a sum of positive squares in 4 ways, for example, as 14964628900 + 186158594521 = 122330^2 + 431461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201123223421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201123223423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3724865 + ... + 3778473.

It is an arithmetic number, because the mean of its divisors is an integer number (25400712855).

Almost surely, 2^201123223421 is an apocalyptic number.

It is an amenable number.

201123223421 is a deficient number, since it is larger than the sum of its proper divisors (2082479419).

201123223421 is an equidigital number, since it uses as much as digits as its factorization.

201123223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92383.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 201123223421 its reverse (124322321102), we get a palindrome (325445544523).

The spelling of 201123223421 in words is "two hundred one billion, one hundred twenty-three million, two hundred twenty-three thousand, four hundred twenty-one".