21342422141 has 4 divisors (see below), whose sum is σ = 21362057472. Its totient is φ = 21322786812.

The previous prime is 21342422137. The next prime is 21342422191. The reversal of 21342422141 is 14122424312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21342422141 - 2² = 21342422137 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 21342422141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342422191) 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, 9816035 + ... + 9818208.

It is an arithmetic number, because the mean of its divisors is an integer number (5340514368).

Almost surely, 2^21342422141 is an apocalyptic number.

It is an amenable number.

21342422141 is a deficient number, since it is larger than the sum of its proper divisors (19635331).

21342422141 is a wasteful number, since it uses less digits than its factorization.

21342422141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19635330.

The product of its digits is 3072, while the sum is 26.

Adding to 21342422141 its reverse (14122424312), we get a palindrome (35464846453).

The spelling of 21342422141 in words is "twenty-one billion, three hundred forty-two million, four hundred twenty-two thousand, one hundred forty-one".