21122334424 has 32 divisors (see below), whose sum is σ = 40384974240. Its totient is φ = 10355040000.

The previous prime is 21122334421. The next prime is 21122334427. The reversal of 21122334424 is 42443322112.

It is an interprime number because it is at equal distance from previous prime (21122334421) and next prime (21122334427).

It is a junction number, because it is equal to n+sod(n) for n = 21122334392 and 21122334401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122334421) 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, 43677 + ... + 210124.

It is an arithmetic number, because the mean of its divisors is an integer number (1262030445).

Almost surely, 2^21122334424 is an apocalyptic number.

It is an amenable number.

21122334424 is a deficient number, since it is larger than the sum of its proper divisors (19262639816).

21122334424 is a wasteful number, since it uses less digits than its factorization.

21122334424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254011 (or 254007 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 21122334424 its reverse (42443322112), we get a palindrome (63565656536).

The spelling of 21122334424 in words is "twenty-one billion, one hundred twenty-two million, three hundred thirty-four thousand, four hundred twenty-four".