10010121110921 has 2 divisors, whose sum is σ = 10010121110922. Its totient is φ = 10010121110920.

The previous prime is 10010121110917. The next prime is 10010121110963. The reversal of 10010121110921 is 12901112101001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6497630412025 + 3512490698896 = 2549045^2 + 1874164^2 .

It is an emirp because it is prime and its reverse (12901112101001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10010121110921 - 2² = 10010121110917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10010121110893 and 10010121110902.

It is not a weakly prime, because it can be changed into another prime (10010121110021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005060555460 + 5005060555461.

It is an arithmetic number, because the mean of its divisors is an integer number (5005060555461).

Almost surely, 2^{10010121110921} is an apocalyptic number.

It is an amenable number.

10010121110921 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010121110921 is an equidigital number, since it uses as much as digits as its factorization.

10010121110921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 10010121110921 its reverse (12901112101001), we get a palindrome (22911233211922).

The spelling of 10010121110921 in words is "ten trillion, ten billion, one hundred twenty-one million, one hundred ten thousand, nine hundred twenty-one".