2061221 has 4 divisors (see below), whose sum is σ = 2127744. Its totient is φ = 1994700.

The previous prime is 2061217. The next prime is 2061239. The reversal of 2061221 is 1221602.

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: 1221602 = 2 ⋅610801.

It is a cyclic number.

It is not a de Polignac number, because 2061221 - 2² = 2061217 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2061196 and 2061205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33215 + ... + 33276.

It is an arithmetic number, because the mean of its divisors is an integer number (531936).

2^2061221 is an apocalyptic number.

It is an amenable number.

2061221 is a deficient number, since it is larger than the sum of its proper divisors (66523).

2061221 is an equidigital number, since it uses as much as digits as its factorization.

2061221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66522.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2061221 is about 1435.6953019356. The cubic root of 2061221 is about 127.2647668336.

Adding to 2061221 its reverse (1221602), we get a palindrome (3282823).

The spelling of 2061221 in words is "two million, sixty-one thousand, two hundred twenty-one".