10021101021 has 12 divisors (see below), whose sum is σ = 14475926400. Its totient is φ = 6680271240.

The previous prime is 10021101017. The next prime is 10021101037. The reversal of 10021101021 is 12010112001.

It is a happy number.

10021101021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10021101021 - 2² = 10021101017 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 = 10021100994 and 10021101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021101221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144130 + ... + 202028.

It is an arithmetic number, because the mean of its divisors is an integer number (1206327200).

Almost surely, 2^10021101021 is an apocalyptic number.

It is an amenable number.

10021101021 is a deficient number, since it is larger than the sum of its proper divisors (4454825379).

10021101021 is a wasteful number, since it uses less digits than its factorization.

10021101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77136 (or 77133 counting only the distinct ones).

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

Adding to 10021101021 its reverse (12010112001), we get a palindrome (22031213022).

The spelling of 10021101021 in words is "ten billion, twenty-one million, one hundred one thousand, twenty-one".