21111100022 has 32 divisors (see below), whose sum is σ = 33378028992. Its totient is φ = 9994614784.

The previous prime is 21111100007. The next prime is 21111100033. The reversal of 21111100022 is 22000111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111099976 and 21111100012.

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, 5076368 + ... + 5080524.

It is an arithmetic number, because the mean of its divisors is an integer number (1043063406).

Almost surely, 2^21111100022 is an apocalyptic number.

21111100022 is a deficient number, since it is larger than the sum of its proper divisors (12266928970).

21111100022 is a wasteful number, since it uses less digits than its factorization.

21111100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21111100022 its reverse (22000111112), we get a palindrome (43111211134).

The spelling of 21111100022 in words is "twenty-one billion, one hundred eleven million, one hundred thousand, twenty-two".