11111010010101 has 16 divisors (see below), whose sum is σ = 16460810409600. Its totient is φ = 7407315329184.

The previous prime is 11111010010097. The next prime is 11111010010189. The reversal of 11111010010101 is 10101001011111.

It is not a de Polignac number, because 11111010010101 - 2² = 11111010010097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111010030101) 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, 11521185 + ... + 12448281.

It is an arithmetic number, because the mean of its divisors is an integer number (1028800650600).

Almost surely, 2^{11111010010101} is an apocalyptic number.

It is an amenable number.

11111010010101 is a deficient number, since it is larger than the sum of its proper divisors (5349800399499).

11111010010101 is an equidigital number, since it uses as much as digits as its factorization.

11111010010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370985 (or 1370979 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 11111010010101 its reverse (10101001011111), we get a palindrome (21212011021212).

The spelling of 11111010010101 in words is "eleven trillion, one hundred eleven billion, ten million, ten thousand, one hundred one".