21014012234 has 4 divisors (see below), whose sum is σ = 31521018354. Its totient is φ = 10507006116.

The previous prime is 21014012231. The next prime is 21014012309. The reversal of 21014012234 is 43221041012.

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., 15624250009 + 5389762225 = 124997^2 + 73415^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21014012231) by changing a digit.

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, 5253503057 + ... + 5253503060.

Almost surely, 2^21014012234 is an apocalyptic number.

21014012234 is a deficient number, since it is larger than the sum of its proper divisors (10507006120).

21014012234 is a wasteful number, since it uses less digits than its factorization.

21014012234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10507006119.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21014012234 its reverse (43221041012), we get a palindrome (64235053246).

The spelling of 21014012234 in words is "twenty-one billion, fourteen million, twelve thousand, two hundred thirty-four".