10100101001021 has 2 divisors, whose sum is σ = 10100101001022. Its totient is φ = 10100101001020.

The previous prime is 10100101000903. The next prime is 10100101001057. The reversal of 10100101001021 is 12010010100101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6487387291225 + 3612713709796 = 2547035^2 + 1900714^2 .

It is a cyclic number.

It is not a de Polignac number, because 10100101001021 - 2¹⁰ = 10100100999997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10100101001821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050050500510 + 5050050500511.

It is an arithmetic number, because the mean of its divisors is an integer number (5050050500511).

Almost surely, 2^{10100101001021} is an apocalyptic number.

It is an amenable number.

10100101001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10100101001021 is an equidigital number, since it uses as much as digits as its factorization.

10100101001021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 10100101001021 its reverse (12010010100101), we get a palindrome (22110111101122).

The spelling of 10100101001021 in words is "ten trillion, one hundred billion, one hundred one million, one thousand, twenty-one".