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22202121 = 39198053
BaseRepresentation
bin101010010110…
…0011100001001
31112202222120210
41110230130021
521140431441
62111511333
7356500134
oct124543411
945688523
1022202121
1111594867
127528549
1347a4866
142d3d21b
151e38616
hex152c709

22202121 has 8 divisors (see below), whose sum is σ = 29638720. Its totient is φ = 14783472.

The previous prime is 22202111. The next prime is 22202137. The reversal of 22202121 is 12120222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22202121 - 213 = 22193929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22202097 and 22202106.

It is not an unprimeable number, because it can be changed into a prime (22202111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 6783.

It is an arithmetic number, because the mean of its divisors is an integer number (3704840).

Almost surely, 222202121 is an apocalyptic number.

It is an amenable number.

22202121 is a deficient number, since it is larger than the sum of its proper divisors (7436599).

22202121 is an equidigital number, since it uses as much as digits as its factorization.

22202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8975.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22202121 is about 4711.9126689700. The cubic root of 22202121 is about 281.0594260575.

Adding to 22202121 its reverse (12120222), we get a palindrome (34322343).

The spelling of 22202121 in words is "twenty-two million, two hundred two thousand, one hundred twenty-one".

Divisors: 1 3 919 2757 8053 24159 7400707 22202121