12102011221021 has 2 divisors, whose sum is σ = 12102011221022. Its totient is φ = 12102011221020.

The previous prime is 12102011220947. The next prime is 12102011221043. The reversal of 12102011221021 is 12012211020121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11885869912921 + 216141308100 = 3447589^2 + 464910^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102011221021 - 2¹³ = 12102011212829 is a prime.

It is a super-3 number, since 3×12102011221021³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12102011220986 and 12102011221004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12102011221081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051005610510 + 6051005610511.

It is an arithmetic number, because the mean of its divisors is an integer number (6051005610511).

Almost surely, 2^{12102011221021} is an apocalyptic number.

It is an amenable number.

12102011221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12102011221021 is an equidigital number, since it uses as much as digits as its factorization.

12102011221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12102011221021 its reverse (12012211020121), we get a palindrome (24114222241142).

The spelling of 12102011221021 in words is "twelve trillion, one hundred two billion, eleven million, two hundred twenty-one thousand, twenty-one".