121302130213021 has 6 divisors (see below), whose sum is σ = 124332879452666. Its totient is φ = 118343541669600.

The previous prime is 121302130213013. The next prime is 121302130213039. The reversal of 121302130213021 is 120312031203121.

It can be written as a sum of positive squares in 3 ways, for example, as 51508572025 + 121250621640996 = 226955^2 + 11011386^2 .

It is not a de Polignac number, because 121302130213021 - 2³ = 121302130213013 is a prime.

It is a super-2 number, since 2×121302130213021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121302130212983 and 121302130213001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302130213001) 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 in 5 ways as a sum of consecutive naturals, for example, 36080346390 + ... + 36080349751.

Almost surely, 2^{121302130213021} is an apocalyptic number.

It is an amenable number.

121302130213021 is a deficient number, since it is larger than the sum of its proper divisors (3030749239645).

121302130213021 is an frugal number, since it uses more digits than its factorization.

121302130213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72160696223 (or 72160696182 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 121302130213021 its reverse (120312031203121), we get a palindrome (241614161416142).

The spelling of 121302130213021 in words is "one hundred twenty-one trillion, three hundred two billion, one hundred thirty million, two hundred thirteen thousand, twenty-one".