1021202069 has 2 divisors, whose sum is σ = 1021202070. Its totient is φ = 1021202068.

The previous prime is 1021201999. The next prime is 1021202071. The reversal of 1021202069 is 9602021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659821969 + 361380100 = 25687^2 + 19010^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021202069 - 2¹⁶ = 1021136533 is a prime.

It is a super-2 number, since 2×1021202069² = 2085707331459761522, which contains 22 as substring.

Together with 1021202071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021207069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510601034 + 510601035.

It is an arithmetic number, because the mean of its divisors is an integer number (510601035).

Almost surely, 2^1021202069 is an apocalyptic number.

It is an amenable number.

1021202069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021202069 is an equidigital number, since it uses as much as digits as its factorization.

1021202069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1021202069 is about 31956.2524242127. The cubic root of 1021202069 is about 1007.0179889474.

The spelling of 1021202069 in words is "one billion, twenty-one million, two hundred two thousand, sixty-nine".