9920960889901 has 4 divisors (see below), whose sum is σ = 9921224649600. Its totient is φ = 9920697130204.

The previous prime is 9920960889859. The next prime is 9920960889913. The reversal of 9920960889901 is 1099880690299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9920960889901 - 2²⁵ = 9920927335469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920960889001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131823421 + ... + 131898658.

It is an arithmetic number, because the mean of its divisors is an integer number (2480306162400).

Almost surely, 2^{9920960889901} is an apocalyptic number.

It is an amenable number.

9920960889901 is a deficient number, since it is larger than the sum of its proper divisors (263759699).

9920960889901 is a wasteful number, since it uses less digits than its factorization.

9920960889901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263759698.

The product of its (nonzero) digits is 45349632, while the sum is 70.

The spelling of 9920960889901 in words is "nine trillion, nine hundred twenty billion, nine hundred sixty million, eight hundred eighty-nine thousand, nine hundred one".