11251021 has 8 divisors (see below), whose sum is σ = 11885600. Its totient is φ = 10620720.

The previous prime is 11251013. The next prime is 11251039. The reversal of 11251021 is 12015211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11251021 - 2³ = 11251013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11250992 and 11251010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11251061) 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, 5395 + ... + 7183.

It is an arithmetic number, because the mean of its divisors is an integer number (1485700).

Almost surely, 2^11251021 is an apocalyptic number.

It is an amenable number.

11251021 is a deficient number, since it is larger than the sum of its proper divisors (634579).

11251021 is a wasteful number, since it uses less digits than its factorization.

11251021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 11251021 is about 3354.2541644902. The cubic root of 11251021 is about 224.0770156624.

Adding to 11251021 its reverse (12015211), we get a palindrome (23266232).

The spelling of 11251021 in words is "eleven million, two hundred fifty-one thousand, twenty-one".