11111010101021 has 8 divisors (see below), whose sum is σ = 11118545196480. Its totient is φ = 11103475838688.

The previous prime is 11111010101011. The next prime is 11111010101027. The reversal of 11111010101021 is 12010101011111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111010101021 - 2²⁶ = 11110942992157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111010100993 and 11111010101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111010101027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27740240 + ... + 28137926.

It is an arithmetic number, because the mean of its divisors is an integer number (1389818149560).

Almost surely, 2^{11111010101021} is an apocalyptic number.

It is an amenable number.

11111010101021 is a deficient number, since it is larger than the sum of its proper divisors (7535095459).

11111010101021 is a wasteful number, since it uses less digits than its factorization.

11111010101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416563.

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

Adding to 11111010101021 its reverse (12010101011111), we get a palindrome (23121111112132).

The spelling of 11111010101021 in words is "eleven trillion, one hundred eleven billion, ten million, one hundred one thousand, twenty-one".