11721012 has 24 divisors (see below), whose sum is σ = 27436416. Its totient is φ = 3894528.

The previous prime is 11720981. The next prime is 11721013. The reversal of 11721012 is 21012711.

11721012 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11720982 and 11721000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2853 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (1143184).

Almost surely, 2^11721012 is an apocalyptic number.

11721012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11721012 is an abundant number, since it is smaller than the sum of its proper divisors (15715404).

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

11721012 is a wasteful number, since it uses less digits than its factorization.

11721012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127 (or 3125 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 11721012 is about 3423.5963547124. The cubic root of 11721012 is about 227.1546876590.

Adding to 11721012 its reverse (21012711), we get a palindrome (32733723).

The spelling of 11721012 in words is "eleven million, seven hundred twenty-one thousand, twelve".