12021121110001 has 2 divisors, whose sum is σ = 12021121110002. Its totient is φ = 12021121110000.

The previous prime is 12021121109981. The next prime is 12021121110059. The reversal of 12021121110001 is 10001112112021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11055618350001 + 965502760000 = 3324999^2 + 982600^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021121110001 - 2¹¹ = 12021121107953 is a prime.

It is not a weakly prime, because it can be changed into another prime (12021121111001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010560555000 + 6010560555001.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560555001).

Almost surely, 2^{12021121110001} is an apocalyptic number.

It is an amenable number.

12021121110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021121110001 is an equidigital number, since it uses as much as digits as its factorization.

12021121110001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12021121110001 its reverse (10001112112021), we get a palindrome (22022233222022).

The spelling of 12021121110001 in words is "twelve trillion, twenty-one billion, one hundred twenty-one million, one hundred ten thousand, one".