21112122122010 has 48 divisors (see below), whose sum is σ = 54957891976416. Its totient is φ = 5623091595744.

The previous prime is 21112122121997. The next prime is 21112122122017. The reversal of 21112122122010 is 1022122121112.

21112122122010 is a `hidden beast` number, since 211 + 1 + 2 + 1 + 221 + 220 + 10 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21112122122017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141750924 + ... + 141899783.

It is an arithmetic number, because the mean of its divisors is an integer number (1144956082842).

Almost surely, 2^{21112122122010} is an apocalyptic number.

21112122122010 is an abundant number, since it is smaller than the sum of its proper divisors (33845769854406).

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

21112122122010 is a wasteful number, since it uses less digits than its factorization.

21112122122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283651547 (or 283651544 counting only the distinct ones).

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

Adding to 21112122122010 its reverse (1022122121112), we get a palindrome (22134244243122).

The spelling of 21112122122010 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, ten".