10211121010221 has 4 divisors (see below), whose sum is σ = 13614828013632. Its totient is φ = 6807414006812.

The previous prime is 10211121010183. The next prime is 10211121010231. The reversal of 10211121010221 is 12201012111201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10211121010221 - 2⁷ = 10211121010093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211121010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211121010231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1701853501701 + ... + 1701853501706.

It is an arithmetic number, because the mean of its divisors is an integer number (3403707003408).

Almost surely, 2^{10211121010221} is an apocalyptic number.

It is an amenable number.

10211121010221 is a deficient number, since it is larger than the sum of its proper divisors (3403707003411).

10211121010221 is an equidigital number, since it uses as much as digits as its factorization.

10211121010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403707003410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10211121010221 its reverse (12201012111201), we get a palindrome (22412133121422).

The spelling of 10211121010221 in words is "ten trillion, two hundred eleven billion, one hundred twenty-one million, ten thousand, two hundred twenty-one".