21342442011 has 8 divisors (see below), whose sum is σ = 31043552064. Its totient is φ = 12934813320.

The previous prime is 21342441973. The next prime is 21342442013. The reversal of 21342442011 is 11024424312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21342442011 - 2⁹ = 21342441499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21342442013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323370301 + ... + 323370366.

It is an arithmetic number, because the mean of its divisors is an integer number (3880444008).

Almost surely, 2^21342442011 is an apocalyptic number.

21342442011 is a deficient number, since it is larger than the sum of its proper divisors (9701110053).

21342442011 is a wasteful number, since it uses less digits than its factorization.

21342442011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646740681.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21342442011 its reverse (11024424312), we get a palindrome (32366866323).

The spelling of 21342442011 in words is "twenty-one billion, three hundred forty-two million, four hundred forty-two thousand, eleven".