10101111112021 has 2 divisors, whose sum is σ = 10101111112022. Its totient is φ = 10101111112020.

The previous prime is 10101111112007. The next prime is 10101111112049. The reversal of 10101111112021 is 12021111110101.

10101111112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10100408596996 + 702515025 = 3178114^2 + 26505^2 .

It is a cyclic number.

It is not a de Polignac number, because 10101111112021 - 2¹⁷ = 10101110980949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10101111111992 and 10101111112010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10101111112921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050555556010 + 5050555556011.

It is an arithmetic number, because the mean of its divisors is an integer number (5050555556011).

Almost surely, 2^{10101111112021} is an apocalyptic number.

It is an amenable number.

10101111112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101111112021 is an equidigital number, since it uses as much as digits as its factorization.

10101111112021 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 13.

Adding to 10101111112021 its reverse (12021111110101), we get a palindrome (22122222222122).

The spelling of 10101111112021 in words is "ten trillion, one hundred one billion, one hundred eleven million, one hundred twelve thousand, twenty-one".