201201423121 has 4 divisors (see below), whose sum is σ = 205482304512. Its totient is φ = 196920541732.

The previous prime is 201201423113. The next prime is 201201423133. The reversal of 201201423121 is 121324102102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201201423121 - 2³ = 201201423113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201201423721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140440625 + ... + 2140440718.

It is an arithmetic number, because the mean of its divisors is an integer number (51370576128).

Almost surely, 2^201201423121 is an apocalyptic number.

It is an amenable number.

201201423121 is a deficient number, since it is larger than the sum of its proper divisors (4280881391).

201201423121 is an equidigital number, since it uses as much as digits as its factorization.

201201423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280881390.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 201201423121 its reverse (121324102102), we get a palindrome (322525525223).

The spelling of 201201423121 in words is "two hundred one billion, two hundred one million, four hundred twenty-three thousand, one hundred twenty-one".