10100200121021 has 2 divisors, whose sum is σ = 10100200121022. Its totient is φ = 10100200121020.

The previous prime is 10100200121003. The next prime is 10100200121051. The reversal of 10100200121021 is 12012100200101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9184906096921 + 915294024100 = 3030661^2 + 956710^2 .

It is a cyclic number.

It is not a de Polignac number, because 10100200121021 - 2¹⁴ = 10100200104637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10100200120993 and 10100200121011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10100200121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050100060510 + 5050100060511.

It is an arithmetic number, because the mean of its divisors is an integer number (5050100060511).

Almost surely, 2^{10100200121021} is an apocalyptic number.

It is an amenable number.

10100200121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10100200121021 is an equidigital number, since it uses as much as digits as its factorization.

10100200121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10100200121021 its reverse (12012100200101), we get a palindrome (22112300321122).

The spelling of 10100200121021 in words is "ten trillion, one hundred billion, two hundred million, one hundred twenty-one thousand, twenty-one".