21113022101 has 4 divisors (see below), whose sum is σ = 21113321100. Its totient is φ = 21112723104.

The previous prime is 21113022089. The next prime is 21113022193. The reversal of 21113022101 is 10122031112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8882874001 + 12230148100 = 94249^2 + 110590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113022101 - 2²² = 21108827797 is a prime.

It is a super-3 number, since 3×21113022101³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113022901) 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 3 ways as a sum of consecutive naturals, for example, 21995 + ... + 206663.

It is an arithmetic number, because the mean of its divisors is an integer number (5278330275).

Almost surely, 2^21113022101 is an apocalyptic number.

It is an amenable number.

21113022101 is a deficient number, since it is larger than the sum of its proper divisors (298999).

21113022101 is a wasteful number, since it uses less digits than its factorization.

21113022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298998.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21113022101 its reverse (10122031112), we get a palindrome (31235053213).

The spelling of 21113022101 in words is "twenty-one billion, one hundred thirteen million, twenty-two thousand, one hundred one".