21112100022 has 32 divisors (see below), whose sum is σ = 45897207552. Its totient is φ = 6435317664.

The previous prime is 21112100017. The next prime is 21112100101. The reversal of 21112100022 is 22000121112.

It is a junction number, because it is equal to n+sod(n) for n = 21112099980 and 21112100007.

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, 1256458 + ... + 1273149.

It is an arithmetic number, because the mean of its divisors is an integer number (1434287736).

Almost surely, 2^21112100022 is an apocalyptic number.

21112100022 is an abundant number, since it is smaller than the sum of its proper divisors (24785107530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112100022 is a wasteful number, since it uses less digits than its factorization.

21112100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529732.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21112100022 its reverse (22000121112), we get a palindrome (43112221134).

The spelling of 21112100022 in words is "twenty-one billion, one hundred twelve million, one hundred thousand, twenty-two".