21110220122 has 16 divisors (see below), whose sum is σ = 31715945280. Its totient is φ = 10538254272.

The previous prime is 21110220077. The next prime is 21110220143. The reversal of 21110220122 is 22102201112.

It is a junction number, because it is equal to n+sod(n) for n = 21110220097 and 21110220106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4211954 + ... + 4216962.

It is an arithmetic number, because the mean of its divisors is an integer number (1982246580).

Almost surely, 2^21110220122 is an apocalyptic number.

21110220122 is a deficient number, since it is larger than the sum of its proper divisors (10605725158).

21110220122 is a wasteful number, since it uses less digits than its factorization.

21110220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7957.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21110220122 its reverse (22102201112), we get a palindrome (43212421234).

The spelling of 21110220122 in words is "twenty-one billion, one hundred ten million, two hundred twenty thousand, one hundred twenty-two".