121003111013221 has 2 divisors, whose sum is σ = 121003111013222. Its totient is φ = 121003111013220.

The previous prime is 121003111013179. The next prime is 121003111013269. The reversal of 121003111013221 is 122310111300121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120163010448321 + 840100564900 = 10961889^2 + 916570^2 .

It is an emirp because it is prime and its reverse (122310111300121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121003111013221 - 2²¹ = 121003108916069 is a prime.

It is a super-2 number, since 2×121003111013221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121003111013621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501555506610 + 60501555506611.

It is an arithmetic number, because the mean of its divisors is an integer number (60501555506611).

Almost surely, 2^{121003111013221} is an apocalyptic number.

It is an amenable number.

121003111013221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121003111013221 is an equidigital number, since it uses as much as digits as its factorization.

121003111013221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121003111013221 its reverse (122310111300121), we get a palindrome (243313222313342).

The spelling of 121003111013221 in words is "one hundred twenty-one trillion, three billion, one hundred eleven million, thirteen thousand, two hundred twenty-one".