12010221991 has 8 divisors (see below), whose sum is σ = 12129513344. Its totient is φ = 11890982520.

The previous prime is 12010221983. The next prime is 12010222013. The reversal of 12010221991 is 19912201021.

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 12010221991 - 2³ = 12010221983 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 (12010221901) 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, 590176 + ... + 610186.

It is an arithmetic number, because the mean of its divisors is an integer number (1516189168).

Almost surely, 2^12010221991 is an apocalyptic number.

12010221991 is a deficient number, since it is larger than the sum of its proper divisors (119291353).

12010221991 is a wasteful number, since it uses less digits than its factorization.

12010221991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25941.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 12010221991 in words is "twelve billion, ten million, two hundred twenty-one thousand, nine hundred ninety-one".