11101012222121 has 4 divisors (see below), whose sum is σ = 11253080882772. Its totient is φ = 10948943561472.

The previous prime is 11101012222103. The next prime is 11101012222123. The reversal of 11101012222121 is 12122221010111.

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 5798175043600 + 5302837178521 = 2407940^2 + 2302789^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101012222121 - 2²² = 11101008027817 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 11101012222121.

It is not an unprimeable number, because it can be changed into a prime (11101012222123) 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, 76034330216 + ... + 76034330361.

It is an arithmetic number, because the mean of its divisors is an integer number (2813270220693).

Almost surely, 2^{11101012222121} is an apocalyptic number.

It is an amenable number.

11101012222121 is a deficient number, since it is larger than the sum of its proper divisors (152068660651).

11101012222121 is an equidigital number, since it uses as much as digits as its factorization.

11101012222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152068660650.

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

Adding to 11101012222121 its reverse (12122221010111), we get a palindrome (23223233232232).

The spelling of 11101012222121 in words is "eleven trillion, one hundred one billion, twelve million, two hundred twenty-two thousand, one hundred twenty-one".