12011120221 has 4 divisors (see below), whose sum is σ = 12398575744. Its totient is φ = 11623664700.

The previous prime is 12011120201. The next prime is 12011120287. The reversal of 12011120221 is 12202111021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12202111021 = 29 ⋅420762449.

It is a cyclic number.

It is not a de Polignac number, because 12011120221 - 2¹¹ = 12011118173 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 (12011120201) 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, 193727715 + ... + 193727776.

It is an arithmetic number, because the mean of its divisors is an integer number (3099643936).

Almost surely, 2^12011120221 is an apocalyptic number.

It is an amenable number.

12011120221 is a deficient number, since it is larger than the sum of its proper divisors (387455523).

12011120221 is an equidigital number, since it uses as much as digits as its factorization.

12011120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387455522.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011120221 its reverse (12202111021), we get a palindrome (24213231242).

The spelling of 12011120221 in words is "twelve billion, eleven million, one hundred twenty thousand, two hundred twenty-one".