21011133313191 has 32 divisors (see below), whose sum is σ = 34144203179520. Its totient is φ = 11218809563136.

The previous prime is 21011133313153. The next prime is 21011133313213. The reversal of 21011133313191 is 19131333111012.

It is not a de Polignac number, because 21011133313191 - 2⁷ = 21011133313063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011133313141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 211657986 + ... + 211757231.

It is an arithmetic number, because the mean of its divisors is an integer number (1067006349360).

Almost surely, 2^{21011133313191} is an apocalyptic number.

21011133313191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21011133313191 is a deficient number, since it is larger than the sum of its proper divisors (13133069866329).

21011133313191 is a wasteful number, since it uses less digits than its factorization.

21011133313191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423415383.

The product of its (nonzero) digits is 1458, while the sum is 30.

The spelling of 21011133313191 in words is "twenty-one trillion, eleven billion, one hundred thirty-three million, three hundred thirteen thousand, one hundred ninety-one".