9202020210121 has 2 divisors, whose sum is σ = 9202020210122. Its totient is φ = 9202020210120.

The previous prime is 9202020210073. The next prime is 9202020210139. The reversal of 9202020210121 is 1210120202029.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8927779467721 + 274240742400 = 2987939^2 + 523680^2 .

It is an emirp because it is prime and its reverse (1210120202029) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9202020210121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9202020210092 and 9202020210101.

It is not a weakly prime, because it can be changed into another prime (9202020210181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4601010105060 + 4601010105061.

It is an arithmetic number, because the mean of its divisors is an integer number (4601010105061).

Almost surely, 2^{9202020210121} is an apocalyptic number.

It is an amenable number.

9202020210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9202020210121 is an equidigital number, since it uses as much as digits as its factorization.

9202020210121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 9202020210121 in words is "nine trillion, two hundred two billion, twenty million, two hundred ten thousand, one hundred twenty-one".