201113124243421 has 16 divisors (see below), whose sum is σ = 217120972775728. Its totient is φ = 185182170969600.

The previous prime is 201113124243401. The next prime is 201113124243457. The reversal of 201113124243421 is 124342421311102.

It can be written as a sum of positive squares in 8 ways, for example, as 63754396083225 + 137358728160196 = 7984635^2 + 11720014^2 .

It is a cyclic number.

It is not a de Polignac number, because 201113124243421 - 2¹⁹ = 201113123719133 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 (201113124243401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49474561 + ... + 53385001.

It is an arithmetic number, because the mean of its divisors is an integer number (13570060798483).

Almost surely, 2^{201113124243421} is an apocalyptic number.

It is an amenable number.

201113124243421 is a deficient number, since it is larger than the sum of its proper divisors (16007848532307).

201113124243421 is a wasteful number, since it uses less digits than its factorization.

201113124243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920272.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 201113124243421 its reverse (124342421311102), we get a palindrome (325455545554523).

The spelling of 201113124243421 in words is "two hundred one trillion, one hundred thirteen billion, one hundred twenty-four million, two hundred forty-three thousand, four hundred twenty-one".