21110012122 has 16 divisors (see below), whose sum is σ = 33362559360. Its totient is φ = 9998070192.

The previous prime is 21110012117. The next prime is 21110012129. The reversal of 21110012122 is 22121001112.

It is a super-2 number, since 2×21110012122² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110012129) 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, 2222997 + ... + 2232472.

It is an arithmetic number, because the mean of its divisors is an integer number (2085159960).

Almost surely, 2^21110012122 is an apocalyptic number.

21110012122 is a deficient number, since it is larger than the sum of its proper divisors (12252547238).

21110012122 is a wasteful number, since it uses less digits than its factorization.

21110012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455597.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21110012122 its reverse (22121001112), we get a palindrome (43231013234).

The spelling of 21110012122 in words is "twenty-one billion, one hundred ten million, twelve thousand, one hundred twenty-two".