11021398 has 4 divisors (see below), whose sum is σ = 16532100. Its totient is φ = 5510698.

The previous prime is 11021383. The next prime is 11021407. The reversal of 11021398 is 89312011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89312011 = 4219 ⋅21169.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2755348 + ... + 2755351.

It is an arithmetic number, because the mean of its divisors is an integer number (4133025).

Almost surely, 2^11021398 is an apocalyptic number.

11021398 is a deficient number, since it is larger than the sum of its proper divisors (5510702).

11021398 is an equidigital number, since it uses as much as digits as its factorization.

11021398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5510701.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 11021398 is about 3319.8490929559. The cubic root of 11021398 is about 222.5421239103.

It can be divided in two parts, 1102 and 1398, that added together give a square (2500 = 50²).

The spelling of 11021398 in words is "eleven million, twenty-one thousand, three hundred ninety-eight".