881221 has 4 divisors (see below), whose sum is σ = 961344. Its totient is φ = 801100.

The previous prime is 881219. The next prime is 881233. The reversal of 881221 is 122188.

881221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 881221 - 2¹ = 881219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 881192 and 881201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831221) 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, 40045 + ... + 40066.

It is an arithmetic number, because the mean of its divisors is an integer number (240336).

2⁸⁸¹²²¹ is an apocalyptic number.

It is an amenable number.

881221 is a deficient number, since it is larger than the sum of its proper divisors (80123).

881221 is a wasteful number, since it uses less digits than its factorization.

881221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80122.

The product of its digits is 256, while the sum is 22.

The square root of 881221 is about 938.7337215633. The cubic root of 881221 is about 95.8726972924.

The spelling of 881221 in words is "eight hundred eighty-one thousand, two hundred twenty-one".