21000110122 has 8 divisors (see below), whose sum is σ = 32232727296. Its totient is φ = 10255867692.

The previous prime is 21000110057. The next prime is 21000110123. The reversal of 21000110122 is 22101100012.

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

It is a super-2 number, since 2×21000110122² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21000110099 and 21000110108.

It is not an unprimeable number, because it can be changed into a prime (21000110123) 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, 122093578 + ... + 122093749.

It is an arithmetic number, because the mean of its divisors is an integer number (4029090912).

Almost surely, 2^21000110122 is an apocalyptic number.

21000110122 is a deficient number, since it is larger than the sum of its proper divisors (11232617174).

21000110122 is a wasteful number, since it uses less digits than its factorization.

21000110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244187372.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000110122 its reverse (22101100012), we get a palindrome (43101210134).

The spelling of 21000110122 in words is "twenty-one billion, one hundred ten thousand, one hundred twenty-two".