201310111421 has 4 divisors (see below), whose sum is σ = 204610277244. Its totient is φ = 198009945600.

The previous prime is 201310111411. The next prime is 201310111439. The reversal of 201310111421 is 124111013102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23959634521 + 177350476900 = 154789^2 + 421130^2 .

It is a cyclic number.

It is not a de Polignac number, because 201310111421 - 2²⁶ = 201243002557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201310111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201310111411) 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, 1650082820 + ... + 1650082941.

It is an arithmetic number, because the mean of its divisors is an integer number (51152569311).

Almost surely, 2^201310111421 is an apocalyptic number.

It is an amenable number.

201310111421 is a deficient number, since it is larger than the sum of its proper divisors (3300165823).

201310111421 is an equidigital number, since it uses as much as digits as its factorization.

201310111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300165822.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 201310111421 its reverse (124111013102), we get a palindrome (325421124523).

The spelling of 201310111421 in words is "two hundred one billion, three hundred ten million, one hundred eleven thousand, four hundred twenty-one".