13054121021 has 2 divisors, whose sum is σ = 13054121022. Its totient is φ = 13054121020.

The previous prime is 13054121011. The next prime is 13054121029. The reversal of 13054121021 is 12012145031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7675512100 + 5378608921 = 87610^2 + 73339^2 .

It is a cyclic number.

It is not a de Polignac number, because 13054121021 - 2¹⁰ = 13054119997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13054120984 and 13054121002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13054121029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6527060510 + 6527060511.

It is an arithmetic number, because the mean of its divisors is an integer number (6527060511).

Almost surely, 2^13054121021 is an apocalyptic number.

It is an amenable number.

13054121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13054121021 is an equidigital number, since it uses as much as digits as its factorization.

13054121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 13054121021 its reverse (12012145031), we get a palindrome (25066266052).

The spelling of 13054121021 in words is "thirteen billion, fifty-four million, one hundred twenty-one thousand, twenty-one".