10211102110021 has 4 divisors (see below), whose sum is σ = 10221999765292. Its totient is φ = 10200204454752.

The previous prime is 10211102110007. The next prime is 10211102110063. The reversal of 10211102110021 is 12001120111201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4824590285025 + 5386511824996 = 2196495^2 + 2320886^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211102110021 - 2¹⁹ = 10211101585733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211102109983 and 10211102110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211102110421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5448826230 + ... + 5448828103.

It is an arithmetic number, because the mean of its divisors is an integer number (2555499941323).

Almost surely, 2^{10211102110021} is an apocalyptic number.

It is an amenable number.

10211102110021 is a deficient number, since it is larger than the sum of its proper divisors (10897655271).

10211102110021 is an equidigital number, since it uses as much as digits as its factorization.

10211102110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10897655270.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10211102110021 its reverse (12001120111201), we get a palindrome (22212222221222).

The spelling of 10211102110021 in words is "ten trillion, two hundred eleven billion, one hundred two million, one hundred ten thousand, twenty-one".