11100211202121 has 8 divisors (see below), whose sum is σ = 14800507999200. Its totient is φ = 7400027603232.

The previous prime is 11100211202099. The next prime is 11100211202177. The reversal of 11100211202121 is 12120211200111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11100211202121 - 2⁹ = 11100211201609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11100211202121.

It is not an unprimeable number, because it can be changed into a prime (11100211202191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28070475 + ... + 28463168.

It is an arithmetic number, because the mean of its divisors is an integer number (1850063499900).

Almost surely, 2^{11100211202121} is an apocalyptic number.

It is an amenable number.

11100211202121 is a deficient number, since it is larger than the sum of its proper divisors (3700296797079).

11100211202121 is an equidigital number, since it uses as much as digits as its factorization.

11100211202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56599095.

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

Adding to 11100211202121 its reverse (12120211200111), we get a palindrome (23220422402232).

The spelling of 11100211202121 in words is "eleven trillion, one hundred billion, two hundred eleven million, two hundred two thousand, one hundred twenty-one".