10111000021021 has 2 divisors, whose sum is σ = 10111000021022. Its totient is φ = 10111000021020.

The previous prime is 10111000021007. The next prime is 10111000021061. The reversal of 10111000021021 is 12012000011101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7560239668921 + 2550760352100 = 2749589^2 + 1597110^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111000021021 - 2²⁵ = 10110966466589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111000020989 and 10111000021007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111000021061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055500010510 + 5055500010511.

It is an arithmetic number, because the mean of its divisors is an integer number (5055500010511).

Almost surely, 2^{10111000021021} is an apocalyptic number.

It is an amenable number.

10111000021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111000021021 is an equidigital number, since it uses as much as digits as its factorization.

10111000021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10111000021021 its reverse (12012000011101), we get a palindrome (22123000032122).

The spelling of 10111000021021 in words is "ten trillion, one hundred eleven billion, twenty-one thousand, twenty-one".