12221120019991 has 8 divisors (see below), whose sum is σ = 12243707673984. Its totient is φ = 12198553044480.

The previous prime is 12221120019973. The next prime is 12221120020003. The reversal of 12221120019991 is 19991002112221.

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 12221120019991 - 2⁷ = 12221120019863 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 (12221120019931) 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, 3986266 + ... + 6350791.

It is an arithmetic number, because the mean of its divisors is an integer number (1530463459248).

Almost surely, 2^{12221120019991} is an apocalyptic number.

12221120019991 is a deficient number, since it is larger than the sum of its proper divisors (22587653993).

12221120019991 is a wasteful number, since it uses less digits than its factorization.

12221120019991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10339241.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 12221120019991 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty million, nineteen thousand, nine hundred ninety-one".