21114204242 has 4 divisors (see below), whose sum is σ = 31671306366. Its totient is φ = 10557102120.

The previous prime is 21114204229. The next prime is 21114204299. The reversal of 21114204242 is 24240241112.

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., 15113997721 + 6000206521 = 122939^2 + 77461^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278551059 + ... + 5278551062.

Almost surely, 2^21114204242 is an apocalyptic number.

21114204242 is a deficient number, since it is larger than the sum of its proper divisors (10557102124).

21114204242 is a wasteful number, since it uses less digits than its factorization.

21114204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10557102123.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21114204242 its reverse (24240241112), we get a palindrome (45354445354).

The spelling of 21114204242 in words is "twenty-one billion, one hundred fourteen million, two hundred four thousand, two hundred forty-two".