200102111101021 has 2 divisors, whose sum is σ = 200102111101022. Its totient is φ = 200102111101020.

The previous prime is 200102111101007. The next prime is 200102111101043. The reversal of 200102111101021 is 120101111201002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195465173344996 + 4636937756025 = 13980886^2 + 2153355^2 .

It is a cyclic number.

It is not a de Polignac number, because 200102111101021 - 2²⁷ = 200101976883293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200102111100992 and 200102111101010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200102111101051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100051055550510 + 100051055550511.

It is an arithmetic number, because the mean of its divisors is an integer number (100051055550511).

Almost surely, 2^{200102111101021} is an apocalyptic number.

It is an amenable number.

200102111101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200102111101021 is an equidigital number, since it uses as much as digits as its factorization.

200102111101021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 200102111101021 its reverse (120101111201002), we get a palindrome (320203222302023).

The spelling of 200102111101021 in words is "two hundred trillion, one hundred two billion, one hundred eleven million, one hundred one thousand, twenty-one".