9221121869 has 2 divisors, whose sum is σ = 9221121870. Its totient is φ = 9221121868.

The previous prime is 9221121853. The next prime is 9221121887. The reversal of 9221121869 is 9681211229.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8918535844 + 302586025 = 94438^2 + 17395^2 .

It is a cyclic number.

It is not a de Polignac number, because 9221121869 - 2⁴ = 9221121853 is a prime.

It is a super-2 number, since 2×9221121869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9221121809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4610560934 + 4610560935.

It is an arithmetic number, because the mean of its divisors is an integer number (4610560935).

Almost surely, 2^9221121869 is an apocalyptic number.

It is an amenable number.

9221121869 is a deficient number, since it is larger than the sum of its proper divisors (1).

9221121869 is an equidigital number, since it uses as much as digits as its factorization.

9221121869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 41.

The square root of 9221121869 is about 96026.6726956631. The cubic root of 9221121869 is about 2096.9814431509.

The spelling of 9221121869 in words is "nine billion, two hundred twenty-one million, one hundred twenty-one thousand, eight hundred sixty-nine".