8991020111211 has 24 divisors (see below), whose sum is σ = 13047817997760. Its totient is φ = 5966021401200.

The previous prime is 8991020111191. The next prime is 8991020111287. The reversal of 8991020111211 is 1121110201998.

8991020111211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8991020111211 - 2⁶ = 8991020111147 is a prime.

It is a super-3 number, since 3×8991020111211³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (8991020113211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1009405 + ... + 4359006.

It is an arithmetic number, because the mean of its divisors is an integer number (543659083240).

Almost surely, 2^{8991020111211} is an apocalyptic number.

8991020111211 is a deficient number, since it is larger than the sum of its proper divisors (4056797886549).

8991020111211 is a wasteful number, since it uses less digits than its factorization.

8991020111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369287 (or 5369284 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 36.

The spelling of 8991020111211 in words is "eight trillion, nine hundred ninety-one billion, twenty million, one hundred eleven thousand, two hundred eleven".