21110020022 has 32 divisors (see below), whose sum is σ = 39611256384. Its totient is φ = 8214307200.

The previous prime is 21110020013. The next prime is 21110020037. The reversal of 21110020022 is 22002001112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110019985 and 21110020012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939629 + ... + 961832.

It is an arithmetic number, because the mean of its divisors is an integer number (1237851762).

Almost surely, 2^21110020022 is an apocalyptic number.

21110020022 is a deficient number, since it is larger than the sum of its proper divisors (18501236362).

21110020022 is a wasteful number, since it uses less digits than its factorization.

21110020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901544.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21110020022 its reverse (22002001112), we get a palindrome (43112021134).

The spelling of 21110020022 in words is "twenty-one billion, one hundred ten million, twenty thousand, twenty-two".