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11252021 = 111022911

11252021 has 4 divisors (see below), whose sum is σ = 12274944. Its totient is φ = 10229100.

The previous prime is 11251979. The next prime is 11252023. The reversal of 11252021 is 12025211.

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 = 111093201.

It is a cyclic number.

It is not a de Polignac number, because 11252021 - 222 = 7057717 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11251987 and 11252005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11252023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511445 + ... + 511466.

It is an arithmetic number, because the mean of its divisors is an integer number (3068736).

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 deficient number, since it is larger than the sum of its proper divisors (1022923).

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 product of its (nonzero) digits is 40, while the sum is 14.

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".

Divisors: 1 11 1022911 11252021