9912020011 has 4 divisors (see below), whose sum is σ = 10231762624. Its totient is φ = 9592277400.

The previous prime is 9912019987. The next prime is 9912020023. The reversal of 9912020011 is 1100202199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9912020011 - 2²⁹ = 9375149099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9912020071) 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, 159871260 + ... + 159871321.

It is an arithmetic number, because the mean of its divisors is an integer number (2557940656).

Almost surely, 2^9912020011 is an apocalyptic number.

9912020011 is a deficient number, since it is larger than the sum of its proper divisors (319742613).

9912020011 is a wasteful number, since it uses less digits than its factorization.

9912020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319742612.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 9912020011 is about 99559.1282153475. The cubic root of 9912020011 is about 2148.0978316355.

The spelling of 9912020011 in words is "nine billion, nine hundred twelve million, twenty thousand, eleven".