10211101222121 has 4 divisors (see below), whose sum is σ = 10216702486272. Its totient is φ = 10205499957972.

The previous prime is 10211101222087. The next prime is 10211101222129. The reversal of 10211101222121 is 12122210111201.

10211101222121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10211101222121 - 2¹⁴ = 10211101205737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 10211101222121.

It is not an unprimeable number, because it can be changed into a prime (10211101222129) 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, 2800629341 + ... + 2800632986.

It is an arithmetic number, because the mean of its divisors is an integer number (2554175621568).

Almost surely, 2^{10211101222121} is an apocalyptic number.

It is an amenable number.

10211101222121 is a deficient number, since it is larger than the sum of its proper divisors (5601264151).

10211101222121 is an equidigital number, since it uses as much as digits as its factorization.

10211101222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601264150.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10211101222121 its reverse (12122210111201), we get a palindrome (22333311333322).

The spelling of 10211101222121 in words is "ten trillion, two hundred eleven billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-one".