21122110222101 has 24 divisors (see below), whose sum is σ = 34869186909440. Its totient is φ = 12069451378656.

The previous prime is 21122110222099. The next prime is 21122110222127. The reversal of 21122110222101 is 10122201122112.

21122110222101 is a `hidden beast` number, since 211 + 22 + 110 + 222 + 101 = 666.

It is not a de Polignac number, because 21122110222101 - 2¹ = 21122110222099 is a prime.

It is a super-2 number, since 2×21122110222101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122110222201) 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, 2164765 + ... + 6850578.

Almost surely, 2^{21122110222101} is an apocalyptic number.

21122110222101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21122110222101 is a deficient number, since it is larger than the sum of its proper divisors (13747076687339).

21122110222101 is a wasteful number, since it uses less digits than its factorization.

21122110222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9052545 (or 9052542 counting only the distinct ones).

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

Adding to 21122110222101 its reverse (10122201122112), we get a palindrome (31244311344213).

The spelling of 21122110222101 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred ten million, two hundred twenty-two thousand, one hundred one".