12031101033221 has 4 divisors (see below), whose sum is σ = 12031116055500. Its totient is φ = 12031086010944.

The previous prime is 12031101033197. The next prime is 12031101033223. The reversal of 12031101033221 is 12233010113021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5670042004225 + 6361059028996 = 2381185^2 + 2522114^2 .

It is a cyclic number.

It is not a de Polignac number, because 12031101033221 - 2³⁰ = 12030027291397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031101033193 and 12031101033202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12031101033223) 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, 6237866 + ... + 7935563.

It is an arithmetic number, because the mean of its divisors is an integer number (3007779013875).

Almost surely, 2^{12031101033221} is an apocalyptic number.

It is an amenable number.

12031101033221 is a deficient number, since it is larger than the sum of its proper divisors (15022279).

12031101033221 is an equidigital number, since it uses as much as digits as its factorization.

12031101033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15022278.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 12031101033221 its reverse (12233010113021), we get a palindrome (24264111146242).

The spelling of 12031101033221 in words is "twelve trillion, thirty-one billion, one hundred one million, thirty-three thousand, two hundred twenty-one".