21110022101 has 16 divisors (see below), whose sum is σ = 24271228800. Its totient is φ = 17985513408.

The previous prime is 21110022083. The next prime is 21110022107. The reversal of 21110022101 is 10122001112.

It is a cyclic number.

It is not a de Polignac number, because 21110022101 - 2²⁶ = 21042913237 is a prime.

It is a super-3 number, since 3×21110022101³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110022107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784610 + ... + 811068.

It is an arithmetic number, because the mean of its divisors is an integer number (1516951800).

Almost surely, 2^21110022101 is an apocalyptic number.

It is an amenable number.

21110022101 is a deficient number, since it is larger than the sum of its proper divisors (3161206699).

21110022101 is a wasteful number, since it uses less digits than its factorization.

21110022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27148.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110022101 its reverse (10122001112), we get a palindrome (31232023213).

The spelling of 21110022101 in words is "twenty-one billion, one hundred ten million, twenty-two thousand, one hundred one".