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20221121 = 33161091
BaseRepresentation
bin100110100100…
…0110011000001
31102001100011102
41031020303001
520134033441
62001224145
7333606464
oct115106301
942040142
1020221121
1110461478
126932055
13425cc7b
1429852db
151b9669b
hex1348cc1

20221121 has 4 divisors (see below), whose sum is σ = 20282544. Its totient is φ = 20159700.

The previous prime is 20221099. The next prime is 20221127. The reversal of 20221121 is 12112202.

It is a happy number.

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 20221121 - 218 = 19958977 is a prime.

It is a super-4 number, since 4×202211214 (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20221127) 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, 30215 + ... + 30876.

It is an arithmetic number, because the mean of its divisors is an integer number (5070636).

Almost surely, 220221121 is an apocalyptic number.

It is an amenable number.

20221121 is a deficient number, since it is larger than the sum of its proper divisors (61423).

20221121 is an equidigital number, since it uses as much as digits as its factorization.

20221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61422.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20221121 is about 4496.7900773774. The cubic root of 20221121 is about 272.4384553657.

Adding to 20221121 its reverse (12112202), we get a palindrome (32333323).

The spelling of 20221121 in words is "twenty million, two hundred twenty-one thousand, one hundred twenty-one".

Divisors: 1 331 61091 20221121