120331121221 has 2 divisors, whose sum is σ = 120331121222. Its totient is φ = 120331121220.

The previous prime is 120331121167. The next prime is 120331121249. The reversal of 120331121221 is 122121133021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101752068196 + 18579053025 = 318986^2 + 136305^2 .

It is a cyclic number.

It is not a de Polignac number, because 120331121221 - 2⁹ = 120331120709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120331121021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60165560610 + 60165560611.

It is an arithmetic number, because the mean of its divisors is an integer number (60165560611).

Almost surely, 2^120331121221 is an apocalyptic number.

It is an amenable number.

120331121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

120331121221 is an equidigital number, since it uses as much as digits as its factorization.

120331121221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 120331121221 its reverse (122121133021), we get a palindrome (242452254242).

The spelling of 120331121221 in words is "one hundred twenty billion, three hundred thirty-one million, one hundred twenty-one thousand, two hundred twenty-one".