9965221442 has 12 divisors (see below), whose sum is σ = 16430262198. Its totient is φ = 4529646000.

The previous prime is 9965221439. The next prime is 9965221457. The reversal of 9965221442 is 2441225699.

It can be written as a sum of positive squares in only one way, i.e., 7213274761 + 2751946681 = 84931^2 + 52459^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9965221393 and 9965221402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20589059 + ... + 20589542.

Almost surely, 2^9965221442 is an apocalyptic number.

9965221442 is a deficient number, since it is larger than the sum of its proper divisors (6465040756).

9965221442 is a wasteful number, since it uses less digits than its factorization.

9965221442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41178625 (or 41178614 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 9965221442 is about 99825.9557530004. The cubic root of 9965221442 is about 2151.9341845944.

The spelling of 9965221442 in words is "nine billion, nine hundred sixty-five million, two hundred twenty-one thousand, four hundred forty-two".