11211100121 has 16 divisors (see below), whose sum is σ = 12468072960. Its totient is φ = 10010770560.

The previous prime is 11211100097. The next prime is 11211100141. The reversal of 11211100121 is 12100111211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211100121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211100141) 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, 1418246 + ... + 1426128.

It is an arithmetic number, because the mean of its divisors is an integer number (779254560).

Almost surely, 2^11211100121 is an apocalyptic number.

It is an amenable number.

11211100121 is a deficient number, since it is larger than the sum of its proper divisors (1256972839).

11211100121 is a wasteful number, since it uses less digits than its factorization.

11211100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11456.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11211100121 its reverse (12100111211), we get a palindrome (23311211332).

The spelling of 11211100121 in words is "eleven billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".