202120969 has 2 divisors, whose sum is σ = 202120970. Its totient is φ = 202120968.

The previous prime is 202120957. The next prime is 202120979. The reversal of 202120969 is 969021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182655225 + 19465744 = 13515^2 + 4412^2 .

It is a cyclic number.

It is not a de Polignac number, because 202120969 - 2¹¹ = 202118921 is a prime.

It is a super-2 number, since 2×202120969² = 81705772218997922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 202120969.

It is not a weakly prime, because it can be changed into another prime (202120979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101060484 + 101060485.

It is an arithmetic number, because the mean of its divisors is an integer number (101060485).

Almost surely, 2^202120969 is an apocalyptic number.

It is an amenable number.

202120969 is a deficient number, since it is larger than the sum of its proper divisors (1).

202120969 is an equidigital number, since it uses as much as digits as its factorization.

202120969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 202120969 is about 14216.9254411775. The cubic root of 202120969 is about 586.8635330970.

The spelling of 202120969 in words is "two hundred two million, one hundred twenty thousand, nine hundred sixty-nine".