11121390 has 96 divisors (see below), whose sum is σ = 33546240. Its totient is φ = 2503872.

The previous prime is 11121389. The next prime is 11121421. The reversal of 11121390 is 9312111.

11121390 = 211² + 212² + ... + 349².

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79941 + ... + 80079.

It is an arithmetic number, because the mean of its divisors is an integer number (349440).

Almost surely, 2^11121390 is an apocalyptic number.

11121390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11121390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16773120).

11121390 is an abundant number, since it is smaller than the sum of its proper divisors (22424850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11121390 is a wasteful number, since it uses less digits than its factorization.

11121390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 11121390 is about 3334.8748102440. The cubic root of 11121390 is about 223.2131057553.

It can be divided in two parts, 11121 and 390, that added together give a palindrome (11511).

The spelling of 11121390 in words is "eleven million, one hundred twenty-one thousand, three hundred ninety".