12121771 has 2 divisors, whose sum is σ = 12121772. Its totient is φ = 12121770.

The previous prime is 12121757. The next prime is 12121783. The reversal of 12121771 is 17712121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121771 - 2¹³ = 12113579 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060885 + 6060886.

It is an arithmetic number, because the mean of its divisors is an integer number (6060886).

Almost surely, 2^12121771 is an apocalyptic number.

12121771 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121771 is an equidigital number, since it uses as much as digits as its factorization.

12121771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196, while the sum is 22.

The square root of 12121771 is about 3481.6333810440. The cubic root of 12121771 is about 229.7146492751.

Adding to 12121771 its reverse (17712121), we get a palindrome (29833892).

The spelling of 12121771 in words is "twelve million, one hundred twenty-one thousand, seven hundred seventy-one".