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122214221 = 139879239
BaseRepresentation
bin1110100100011…
…01011101001101
322111222010101122
413102031131031
5222241323341
620043250325
73012542453
oct722153515
9274863348
10122214221
1162a94398
1234b199a5
131c420a0c
14123349d3
15aae194b
hex748d74d

122214221 has 4 divisors (see below), whose sum is σ = 123093600. Its totient is φ = 121334844.

The previous prime is 122214187. The next prime is 122214227. The reversal of 122214221 is 122412221.

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: 122412221 = 652918749.

It is a cyclic number.

It is not a de Polignac number, because 122214221 - 214 = 122197837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122214221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122214227) 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, 439481 + ... + 439758.

It is an arithmetic number, because the mean of its divisors is an integer number (30773400).

Almost surely, 2122214221 is an apocalyptic number.

It is an amenable number.

122214221 is a deficient number, since it is larger than the sum of its proper divisors (879379).

122214221 is an equidigital number, since it uses as much as digits as its factorization.

122214221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879378.

The product of its digits is 128, while the sum is 17.

The square root of 122214221 is about 11055.0540930382. The cubic root of 122214221 is about 496.2576880840.

Adding to 122214221 its reverse (122412221), we get a palindrome (244626442).

The spelling of 122214221 in words is "one hundred twenty-two million, two hundred fourteen thousand, two hundred twenty-one".

Divisors: 1 139 879239 122214221