10121002011221 has 2 divisors, whose sum is σ = 10121002011222. Its totient is φ = 10121002011220.

The previous prime is 10121002011187. The next prime is 10121002011229. The reversal of 10121002011221 is 12211020012101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10106454274225 + 14547736996 = 3179065^2 + 120614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121002011221 - 2¹⁴ = 10121001994837 is a prime.

It is a super-2 number, since 2×10121002011221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10121002011196 and 10121002011205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121002011229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060501005610 + 5060501005611.

It is an arithmetic number, because the mean of its divisors is an integer number (5060501005611).

Almost surely, 2^{10121002011221} is an apocalyptic number.

It is an amenable number.

10121002011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121002011221 is an equidigital number, since it uses as much as digits as its factorization.

10121002011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10121002011221 its reverse (12211020012101), we get a palindrome (22332022023322).

The spelling of 10121002011221 in words is "ten trillion, one hundred twenty-one billion, two million, eleven thousand, two hundred twenty-one".