10101211021 has 16 divisors (see below), whose sum is σ = 11078009280. Its totient is φ = 9134248320.

The previous prime is 10101211013. The next prime is 10101211031. The reversal of 10101211021 is 12011210101.

10101211021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10101211021 - 2³ = 10101211013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10101210989 and 10101211007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101211031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4584106 + ... + 4586308.

It is an arithmetic number, because the mean of its divisors is an integer number (692375580).

Almost surely, 2^10101211021 is an apocalyptic number.

10101211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10101211021 is a deficient number, since it is larger than the sum of its proper divisors (976798259).

10101211021 is a wasteful number, since it uses less digits than its factorization.

10101211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10101211021 its reverse (12011210101), we get a palindrome (22112421122).

It can be divided in two parts, 10101 and 211021, that added together give a palindrome (221122).

The spelling of 10101211021 in words is "ten billion, one hundred one million, two hundred eleven thousand, twenty-one".