21120211102122 has 24 divisors (see below), whose sum is σ = 49920498969120. Its totient is φ = 6400063970280.

The previous prime is 21120211102097. The next prime is 21120211102129. The reversal of 21120211102122 is 22120111202112.

21120211102122 is a `hidden beast` number, since 211 + 20 + 211 + 10 + 212 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21120211102095 and 21120211102104.

It is not an unprimeable number, because it can be changed into a prime (21120211102129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53333866222 + ... + 53333866617.

It is an arithmetic number, because the mean of its divisors is an integer number (2080020790380).

Almost surely, 2^{21120211102122} is an apocalyptic number.

21120211102122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21120211102122 is an abundant number, since it is smaller than the sum of its proper divisors (28800287866998).

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

21120211102122 is a wasteful number, since it uses less digits than its factorization.

21120211102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106667732858 (or 106667732855 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21120211102122 its reverse (22120111202112), we get a palindrome (43240322304234).

The spelling of 21120211102122 in words is "twenty-one trillion, one hundred twenty billion, two hundred eleven million, one hundred two thousand, one hundred twenty-two".