2199021 has 16 divisors (see below), whose sum is σ = 3286848. Its totient is φ = 1296000.

The previous prime is 2198981. The next prime is 2199061. The reversal of 2199021 is 1209912.

It is an interprime number because it is at equal distance from previous prime (2198981) and next prime (2199061).

It is not a de Polignac number, because 2199021 - 2¹³ = 2190829 is a prime.

2199021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2198982 and 2199000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321 + ... + 2121.

It is an arithmetic number, because the mean of its divisors is an integer number (205428).

2^2199021 is an apocalyptic number.

It is an amenable number.

2199021 is a deficient number, since it is larger than the sum of its proper divisors (1087827).

2199021 is a wasteful number, since it uses less digits than its factorization.

2199021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2199021 is about 1482.9096398635. The cubic root of 2199021 is about 130.0398497163.

The spelling of 2199021 in words is "two million, one hundred ninety-nine thousand, twenty-one".