21421022222 has 16 divisors (see below), whose sum is σ = 32268199392. Its totient is φ = 10665046560.

The previous prime is 21421022219. The next prime is 21421022291. The reversal of 21421022222 is 22222012412.

It is a junction number, because it is equal to n+sod(n) for n = 21421022194 and 21421022203.

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, 460472 + ... + 504852.

It is an arithmetic number, because the mean of its divisors is an integer number (2016762462).

Almost surely, 2^21421022222 is an apocalyptic number.

21421022222 is a deficient number, since it is larger than the sum of its proper divisors (10847177170).

21421022222 is a wasteful number, since it uses less digits than its factorization.

21421022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45403.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21421022222 its reverse (22222012412), we get a palindrome (43643034634).

The spelling of 21421022222 in words is "twenty-one billion, four hundred twenty-one million, twenty-two thousand, two hundred twenty-two".