11211990 has 32 divisors (see below), whose sum is σ = 27012960. Its totient is φ = 2978304.

The previous prime is 11211989. The next prime is 11212001. The reversal of 11211990 is 9911211.

11211990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 11211990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9556 + ... + 10664.

It is an arithmetic number, because the mean of its divisors is an integer number (844155).

Almost surely, 2^11211990 is an apocalyptic number.

11211990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11211990 is an abundant number, since it is smaller than the sum of its proper divisors (15800970).

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

11211990 is a wasteful number, since it uses less digits than its factorization.

11211990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456.

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 11211990 is about 3348.4309758453. The cubic root of 11211990 is about 223.8175997072.

The spelling of 11211990 in words is "eleven million, two hundred eleven thousand, nine hundred ninety".