11211993 has 32 divisors (see below), whose sum is σ = 18950400.
Its totient is φ = 6490368.
The previous prime is 11211989. The next prime is 11212001. The reversal of 11211993 is 39911211.
11211993 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 11211993 - 22 = 11211989 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (11211913) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5028 + ... + 6906.
It is an arithmetic number, because the mean of its divisors is an integer number (592200).
Almost surely, 211211993 is an apocalyptic number.
11211993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
It is an amenable number.
11211993 is a deficient number, since it is larger than the sum of its proper divisors (7738407).
11211993 is a wasteful number, since it uses less digits than its factorization.
11211993 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1918 (or 1912 counting only the distinct ones).
The product of its digits is 486, while the sum is 27.
The square root of 11211993 is about 3348.4314238162.
The cubic root of 11211993 is about 223.8176196695.
The spelling of 11211993 in words is "eleven million, two hundred eleven thousand, nine hundred ninety-three".