201401413021 has 4 divisors (see below), whose sum is σ = 206844694492. Its totient is φ = 195958131552.

The previous prime is 201401412991. The next prime is 201401413027. The reversal of 201401413021 is 120314104102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120314104102 = 2 ⋅60157052051.

It can be written as a sum of positive squares in 2 ways, for example, as 122279599225 + 79121813796 = 349685^2 + 281286^2 .

It is a cyclic number.

It is not a de Polignac number, because 201401413021 - 2⁷ = 201401412893 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 201401413021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201401413027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2721640680 + ... + 2721640753.

It is an arithmetic number, because the mean of its divisors is an integer number (51711173623).

Almost surely, 2^201401413021 is an apocalyptic number.

It is an amenable number.

201401413021 is a deficient number, since it is larger than the sum of its proper divisors (5443281471).

201401413021 is an equidigital number, since it uses as much as digits as its factorization.

201401413021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5443281470.

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

Adding to 201401413021 its reverse (120314104102), we get a palindrome (321715517123).

The spelling of 201401413021 in words is "two hundred one billion, four hundred one million, four hundred thirteen thousand, twenty-one".