11012121601591 has 4 divisors (see below), whose sum is σ = 12013223565384. Its totient is φ = 10011019637800.

The previous prime is 11012121601567. The next prime is 11012121601603. The reversal of 11012121601591 is 19510612121011.

11012121601591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11012121601591 - 2¹⁵ = 11012121568823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012124601591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500550981880 + ... + 500550981901.

It is an arithmetic number, because the mean of its divisors is an integer number (3003305891346).

Almost surely, 2^{11012121601591} is an apocalyptic number.

11012121601591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11012121601591 is a deficient number, since it is larger than the sum of its proper divisors (1001101963793).

11012121601591 is a wasteful number, since it uses less digits than its factorization.

11012121601591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001101963792.

The product of its (nonzero) digits is 1080, while the sum is 31.

It can be divided in two parts, 110121 and 21601591, that added together give a palindrome (21711712).

The spelling of 11012121601591 in words is "eleven trillion, twelve billion, one hundred twenty-one million, six hundred one thousand, five hundred ninety-one".