10121303231021 has 2 divisors, whose sum is σ = 10121303231022. Its totient is φ = 10121303231020.

The previous prime is 10121303230963. The next prime is 10121303231041. The reversal of 10121303231021 is 12013230312101.

It is a happy number.

It is an a-pointer prime, because the next prime (10121303231041) can be obtained adding 10121303231021 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8118339532900 + 2002963698121 = 2849270^2 + 1415261^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121303231021 - 2¹⁰ = 10121303229997 is a prime.

It is a super-2 number, since 2×10121303231021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10121303230984 and 10121303231002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121303231041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060651615510 + 5060651615511.

It is an arithmetic number, because the mean of its divisors is an integer number (5060651615511).

Almost surely, 2^{10121303231021} is an apocalyptic number.

It is an amenable number.

10121303231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121303231021 is an equidigital number, since it uses as much as digits as its factorization.

10121303231021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 10121303231021 its reverse (12013230312101), we get a palindrome (22134533543122).

The spelling of 10121303231021 in words is "ten trillion, one hundred twenty-one billion, three hundred three million, two hundred thirty-one thousand, twenty-one".