12021000112191 has 32 divisors (see below), whose sum is σ = 18668794636800. Its totient is φ = 6738735772800.

The previous prime is 12021000112153. The next prime is 12021000112201. The reversal of 12021000112191 is 19121100012021.

It is not a de Polignac number, because 12021000112191 - 2¹³ = 12021000103999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021000112091) 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, 25767021 + ... + 26229398.

It is an arithmetic number, because the mean of its divisors is an integer number (583399832400).

Almost surely, 2^{12021000112191} is an apocalyptic number.

12021000112191 is a deficient number, since it is larger than the sum of its proper divisors (6647794524609).

12021000112191 is a wasteful number, since it uses less digits than its factorization.

12021000112191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51996639.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 12021000112191 in words is "twelve trillion, twenty-one billion, one hundred twelve thousand, one hundred ninety-one".