21023422222 has 16 divisors (see below), whose sum is σ = 34434183600. Its totient is φ = 9547151040.

The previous prime is 21023422201. The next prime is 21023422223. The reversal of 21023422222 is 22222432012.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21023422193 and 21023422202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023422223) 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, 423447 + ... + 470482.

It is an arithmetic number, because the mean of its divisors is an integer number (2152136475).

Almost surely, 2^21023422222 is an apocalyptic number.

21023422222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21023422222 is a deficient number, since it is larger than the sum of its proper divisors (13410761378).

21023422222 is a wasteful number, since it uses less digits than its factorization.

21023422222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895011.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21023422222 its reverse (22222432012), we get a palindrome (43245854234).

It can be divided in two parts, 210 and 23422222, that added together give a palindrome (23422432).

The spelling of 21023422222 in words is "twenty-one billion, twenty-three million, four hundred twenty-two thousand, two hundred twenty-two".