21224122054 has 16 divisors (see below), whose sum is σ = 32605021008. Its totient is φ = 10358779392.

The previous prime is 21224122043. The next prime is 21224122061. The reversal of 21224122054 is 45022142212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735172 + ... + 763495.

It is an arithmetic number, because the mean of its divisors is an integer number (2037813813).

Almost surely, 2^21224122054 is an apocalyptic number.

21224122054 is a deficient number, since it is larger than the sum of its proper divisors (11380898954).

21224122054 is a wasteful number, since it uses less digits than its factorization.

21224122054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498839.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 21224122054 its reverse (45022142212), we get a palindrome (66246264266).

The spelling of 21224122054 in words is "twenty-one billion, two hundred twenty-four million, one hundred twenty-two thousand, fifty-four".