It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12025211 = 11 ⋅1093201.
It is a cyclic number.
It is a Curzon number.
It is a congruent number.
Almost surely, 211252021 is an apocalyptic number.
11252021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
It is an amenable number.
11252021 is a wasteful number, since it uses less digits than its factorization.
11252021 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1022922.
The square root of 11252021 is about 3354.4032256126. The cubic root of 11252021 is about 224.0836541822.
Adding to 11252021 its reverse (12025211), we get a palindrome (23277232).
The spelling of 11252021 in words is "eleven million, two hundred fifty-two thousand, twenty-one".