11111010010121 has 24 divisors (see below), whose sum is σ = 13102648278624. Its totient is φ = 9392873555520.

The previous prime is 11111010010097. The next prime is 11111010010189. The reversal of 11111010010121 is 12101001011111.

It is a happy number.

It is not a de Polignac number, because 11111010010121 - 2¹⁰ = 11111010009097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11111010000121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116172506 + ... + 116268108.

It is an arithmetic number, because the mean of its divisors is an integer number (545943678276).

Almost surely, 2^{11111010010121} is an apocalyptic number.

It is an amenable number.

11111010010121 is a deficient number, since it is larger than the sum of its proper divisors (1991638268503).

11111010010121 is an equidigital number, since it uses as much as digits as its factorization.

11111010010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128181 (or 128174 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11111010010121 its reverse (12101001011111), we get a palindrome (23212011021232).

The spelling of 11111010010121 in words is "eleven trillion, one hundred eleven billion, ten million, ten thousand, one hundred twenty-one".