121013100211021 has 2 divisors, whose sum is σ = 121013100211022. Its totient is φ = 121013100211020.

The previous prime is 121013100211009. The next prime is 121013100211039. The reversal of 121013100211021 is 120112001310121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116071771342921 + 4941328868100 = 10773661^2 + 2222910^2 .

It is a cyclic number.

It is not a de Polignac number, because 121013100211021 - 2¹⁵ = 121013100178253 is a prime.

It is a super-2 number, since 2×121013100211021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121013100210986 and 121013100211004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121013100211121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506550105510 + 60506550105511.

It is an arithmetic number, because the mean of its divisors is an integer number (60506550105511).

Almost surely, 2^{121013100211021} is an apocalyptic number.

It is an amenable number.

121013100211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121013100211021 is an equidigital number, since it uses as much as digits as its factorization.

121013100211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121013100211021 its reverse (120112001310121), we get a palindrome (241125101521142).

The spelling of 121013100211021 in words is "one hundred twenty-one trillion, thirteen billion, one hundred million, two hundred eleven thousand, twenty-one".