192121 has 2 divisors, whose sum is σ = 192122. Its totient is φ = 192120.
The previous prime is 192113. The next prime is 192133. The reversal of 192121 is 121291.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 190096 + 2025 = 436^2 + 45^2 .
It is an emirp because it is prime and its reverse (121291) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 192121 - 23 = 192113 is a prime.
192121 is a lucky number.
It is a nialpdrome in base 12.
It is a junction number, because it is equal to n+sod(n) for n = 192095 and 192104.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (192161) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96060 + 96061.
It is an arithmetic number, because the mean of its divisors is an integer number (96061).
2192121 is an apocalyptic number.
It is an amenable number.
192121 is a deficient number, since it is larger than the sum of its proper divisors (1).
192121 is an equidigital number, since it uses as much as digits as its factorization.
192121 is an evil number, because the sum of its binary digits is even.
The product of its digits is 36, while the sum is 16.
The square root of 192121 is about 438.3160959855. The cubic root of 192121 is about 57.7020991700.
It can be divided in two parts, 192 and 121, that multiplied together give a palindrome (23232).
The spelling of 192121 in words is "one hundred ninety-two thousand, one hundred twenty-one".
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