201421234015 has 4 divisors (see below), whose sum is σ = 241705480824. Its totient is φ = 161136987208.

The previous prime is 201421234013. The next prime is 201421234033. The reversal of 201421234015 is 510432124102.

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

It is a cyclic number.

It is not a de Polignac number, because 201421234015 - 2¹ = 201421234013 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 (201421234013) 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, 20142123397 + ... + 20142123406.

It is an arithmetic number, because the mean of its divisors is an integer number (60426370206).

Almost surely, 2^201421234015 is an apocalyptic number.

201421234015 is a deficient number, since it is larger than the sum of its proper divisors (40284246809).

201421234015 is an equidigital number, since it uses as much as digits as its factorization.

201421234015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40284246808.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 201421234015 its reverse (510432124102), we get a palindrome (711853358117).

The spelling of 201421234015 in words is "two hundred one billion, four hundred twenty-one million, two hundred thirty-four thousand, fifteen".