21110222122 has 8 divisors (see below), whose sum is σ = 34543999872. Its totient is φ = 9595555500.

The previous prime is 21110222101. The next prime is 21110222129. The reversal of 21110222122 is 22122201112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21110222096 and 21110222105.

It is not an unprimeable number, because it can be changed into a prime (21110222129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479777754 + ... + 479777797.

It is an arithmetic number, because the mean of its divisors is an integer number (4317999984).

Almost surely, 2^21110222122 is an apocalyptic number.

21110222122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21110222122 is a deficient number, since it is larger than the sum of its proper divisors (13433777750).

21110222122 is a wasteful number, since it uses less digits than its factorization.

21110222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959555564.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21110222122 its reverse (22122201112), we get a palindrome (43232423234).

The spelling of 21110222122 in words is "twenty-one billion, one hundred ten million, two hundred twenty-two thousand, one hundred twenty-two".