21111123022 has 64 divisors (see below), whose sum is σ = 40177036800. Its totient is φ = 8184084480.

The previous prime is 21111123013. The next prime is 21111123023. The reversal of 21111123022 is 22032111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111122987 and 21111123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111123023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98854 + ... + 228022.

It is an arithmetic number, because the mean of its divisors is an integer number (627766200).

Almost surely, 2^21111123022 is an apocalyptic number.

21111123022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21111123022 is a deficient number, since it is larger than the sum of its proper divisors (19065913778).

21111123022 is a wasteful number, since it uses less digits than its factorization.

21111123022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129241.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21111123022 its reverse (22032111112), we get a palindrome (43143234134).

The spelling of 21111123022 in words is "twenty-one billion, one hundred eleven million, one hundred twenty-three thousand, twenty-two".