10021110021 has 24 divisors (see below), whose sum is σ = 16075949760. Its totient is φ = 6166834128.

The previous prime is 10021109983. The next prime is 10021110091. The reversal of 10021110021 is 12001112001.

It is a happy number.

It is not a de Polignac number, because 10021110021 - 2⁷ = 10021109893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10021109985 and 10021110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021110091) 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, 1093521 + ... + 1102646.

It is an arithmetic number, because the mean of its divisors is an integer number (669831240).

Almost surely, 2^10021110021 is an apocalyptic number.

It is an amenable number.

10021110021 is a deficient number, since it is larger than the sum of its proper divisors (6054839739).

10021110021 is a wasteful number, since it uses less digits than its factorization.

10021110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196202 (or 2196183 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10021110021 its reverse (12001112001), we get a palindrome (22022222022).

The spelling of 10021110021 in words is "ten billion, twenty-one million, one hundred ten thousand, twenty-one".