10010111123021 has 4 divisors (see below), whose sum is σ = 10254260174844. Its totient is φ = 9765962071200.

The previous prime is 10010111122993. The next prime is 10010111123029. The reversal of 10010111123021 is 12032111101001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5339265169225 + 4670845953796 = 2310685^2 + 2161214^2 .

It is a cyclic number.

It is not a de Polignac number, because 10010111123021 - 2¹⁴ = 10010111106637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10010111122987 and 10010111123005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010111123029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122074525850 + ... + 122074525931.

It is an arithmetic number, because the mean of its divisors is an integer number (2563565043711).

Almost surely, 2^{10010111123021} is an apocalyptic number.

It is an amenable number.

10010111123021 is a deficient number, since it is larger than the sum of its proper divisors (244149051823).

10010111123021 is an equidigital number, since it uses as much as digits as its factorization.

10010111123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244149051822.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 10010111123021 its reverse (12032111101001), we get a palindrome (22042222224022).

The spelling of 10010111123021 in words is "ten trillion, ten billion, one hundred eleven million, one hundred twenty-three thousand, twenty-one".