10200111001021 has 2 divisors, whose sum is σ = 10200111001022. Its totient is φ = 10200111001020.

The previous prime is 10200111001013. The next prime is 10200111001043. The reversal of 10200111001021 is 12010011100201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5683508448121 + 4516602552900 = 2384011^2 + 2125230^2 .

It is a cyclic number.

It is not a de Polignac number, because 10200111001021 - 2³ = 10200111001013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10200111000989 and 10200111001007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10200111001051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100055500510 + 5100055500511.

It is an arithmetic number, because the mean of its divisors is an integer number (5100055500511).

Almost surely, 2^{10200111001021} is an apocalyptic number.

It is an amenable number.

10200111001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10200111001021 is an equidigital number, since it uses as much as digits as its factorization.

10200111001021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 10200111001021 its reverse (12010011100201), we get a palindrome (22210122101222).

The spelling of 10200111001021 in words is "ten trillion, two hundred billion, one hundred eleven million, one thousand, twenty-one".