10111220211121 has 4 divisors (see below), whose sum is σ = 10145729495412. Its totient is φ = 10076710926832.

The previous prime is 10111220211107. The next prime is 10111220211161. The reversal of 10111220211121 is 12111202211101.

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 6205205550625 + 3906014660496 = 2491025^2 + 1976364^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111220211121 - 2²⁵ = 10111186656689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111220211095 and 10111220211104.

It is not an unprimeable number, because it can be changed into a prime (10111220211161) 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, 17254641706 + ... + 17254642291.

It is an arithmetic number, because the mean of its divisors is an integer number (2536432373853).

Almost surely, 2^{10111220211121} is an apocalyptic number.

It is an amenable number.

10111220211121 is a deficient number, since it is larger than the sum of its proper divisors (34509284291).

10111220211121 is an equidigital number, since it uses as much as digits as its factorization.

10111220211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34509284290.

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

Adding to 10111220211121 its reverse (12111202211101), we get a palindrome (22222422422222).

The spelling of 10111220211121 in words is "ten trillion, one hundred eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".