10200002122021 has 2 divisors, whose sum is σ = 10200002122022. Its totient is φ = 10200002122020.

The previous prime is 10200002121983. The next prime is 10200002122087. The reversal of 10200002122021 is 12022120000201.

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., 5803830264996 + 4396171857025 = 2409114^2 + 2096705^2 .

It is an emirp because it is prime and its reverse (12022120000201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10200002122021 - 2¹¹ = 10200002119973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10200002121992 and 10200002122010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10200002122621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100001061010 + 5100001061011.

It is an arithmetic number, because the mean of its divisors is an integer number (5100001061011).

Almost surely, 2^{10200002122021} is an apocalyptic number.

It is an amenable number.

10200002122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10200002122021 is an equidigital number, since it uses as much as digits as its factorization.

10200002122021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10200002122021 its reverse (12022120000201), we get a palindrome (22222122122222).

The spelling of 10200002122021 in words is "ten trillion, two hundred billion, two million, one hundred twenty-two thousand, twenty-one".