201123241421 has 8 divisors (see below), whose sum is σ = 211717654080. Its totient is φ = 190529726688.

The previous prime is 201123241373. The next prime is 201123241427. The reversal of 201123241421 is 124142321102.

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

It is a de Polignac number, because none of the positive numbers 2^k-201123241421 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 (201123241427) 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, 262385 + ... + 686361.

It is an arithmetic number, because the mean of its divisors is an integer number (26464706760).

Almost surely, 2^201123241421 is an apocalyptic number.

It is an amenable number.

201123241421 is a deficient number, since it is larger than the sum of its proper divisors (10594412659).

201123241421 is a wasteful number, since it uses less digits than its factorization.

201123241421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448963.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 201123241421 its reverse (124142321102), we get a palindrome (325265562523).

The spelling of 201123241421 in words is "two hundred one billion, one hundred twenty-three million, two hundred forty-one thousand, four hundred twenty-one".