10211104321021 has 4 divisors (see below), whose sum is σ = 10247442770844. Its totient is φ = 10174765871200.

The previous prime is 10211104321013. The next prime is 10211104321031. The reversal of 10211104321021 is 12012340111201.

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 8054891076996 + 2156213244025 = 2838114^2 + 1468405^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211104321021 - 2³ = 10211104321013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10211104321021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211104321031) 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, 18169224490 + ... + 18169225051.

It is an arithmetic number, because the mean of its divisors is an integer number (2561860692711).

Almost surely, 2^{10211104321021} is an apocalyptic number.

It is an amenable number.

10211104321021 is a deficient number, since it is larger than the sum of its proper divisors (36338449823).

10211104321021 is an equidigital number, since it uses as much as digits as its factorization.

10211104321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36338449822.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 10211104321021 its reverse (12012340111201), we get a palindrome (22223444432222).

The spelling of 10211104321021 in words is "ten trillion, two hundred eleven billion, one hundred four million, three hundred twenty-one thousand, twenty-one".