21342201442 has 4 divisors (see below), whose sum is σ = 32013302166. Its totient is φ = 10671100720.

The previous prime is 21342201437. The next prime is 21342201443. The reversal of 21342201442 is 24410224312.

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

It can be written as a sum of positive squares in only one way, i.e., 21111799401 + 230402041 = 145299^2 + 15179^2 .

It is not an unprimeable number, because it can be changed into a prime (21342201443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5335550359 + ... + 5335550362.

Almost surely, 2^21342201442 is an apocalyptic number.

21342201442 is a deficient number, since it is larger than the sum of its proper divisors (10671100724).

21342201442 is a wasteful number, since it uses less digits than its factorization.

21342201442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10671100723.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21342201442 its reverse (24410224312), we get a palindrome (45752425754).

It can be divided in two parts, 21342 and 201442, that added together give a square (222784 = 472²).

The spelling of 21342201442 in words is "twenty-one billion, three hundred forty-two million, two hundred one thousand, four hundred forty-two".