21222303542 has 16 divisors (see below), whose sum is σ = 34729808400. Its totient is φ = 9645834240.

The previous prime is 21222303521. The next prime is 21222303563. The reversal of 21222303542 is 24530322212.

It is an interprime number because it is at equal distance from previous prime (21222303521) and next prime (21222303563).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442934 + ... + 488502.

It is an arithmetic number, because the mean of its divisors is an integer number (2170613025).

Almost surely, 2^21222303542 is an apocalyptic number.

21222303542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222303542 is a deficient number, since it is larger than the sum of its proper divisors (13507504858).

21222303542 is a wasteful number, since it uses less digits than its factorization.

21222303542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66751.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 21222303542 its reverse (24530322212), we get a palindrome (45752625754).

The spelling of 21222303542 in words is "twenty-one billion, two hundred twenty-two million, three hundred three thousand, five hundred forty-two".