11100102121 has 4 divisors (see below), whose sum is σ = 11113823700. Its totient is φ = 11086380544.

The previous prime is 11100102113. The next prime is 11100102127. The reversal of 11100102121 is 12120100111.

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 7279502400 + 3820599721 = 85320^2 + 61811^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100102121 - 2³ = 11100102113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11100102098 and 11100102107.

It is not an unprimeable number, because it can be changed into a prime (11100102127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6859576 + ... + 6861193.

It is an arithmetic number, because the mean of its divisors is an integer number (2778455925).

Almost surely, 2^11100102121 is an apocalyptic number.

It is an amenable number.

11100102121 is a deficient number, since it is larger than the sum of its proper divisors (13721579).

11100102121 is an equidigital number, since it uses as much as digits as its factorization.

11100102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13721578.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11100102121 its reverse (12120100111), we get a palindrome (23220202232).

The spelling of 11100102121 in words is "eleven billion, one hundred million, one hundred two thousand, one hundred twenty-one".