11101111002121 has 16 divisors (see below), whose sum is σ = 12714598306944. Its totient is φ = 9494546914944.

The previous prime is 11101111002097. The next prime is 11101111002127. The reversal of 11101111002121 is 12120011110111.

It is not a de Polignac number, because 11101111002121 - 2²¹ = 11101108904969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101111002127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5973646 + ... + 7608328.

It is an arithmetic number, because the mean of its divisors is an integer number (794662394184).

Almost surely, 2^{11101111002121} is an apocalyptic number.

It is an amenable number.

11101111002121 is a deficient number, since it is larger than the sum of its proper divisors (1613487304823).

11101111002121 is a wasteful number, since it uses less digits than its factorization.

11101111002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636800.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11101111002121 its reverse (12120011110111), we get a palindrome (23221122112232).

The spelling of 11101111002121 in words is "eleven trillion, one hundred one billion, one hundred eleven million, two thousand, one hundred twenty-one".