3121121 has 2 divisors, whose sum is σ = 3121122. Its totient is φ = 3121120.

The previous prime is 3121109. The next prime is 3121163. The reversal of 3121121 is 1211213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 193600 = 1711^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121121 - 2⁶ = 3121057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3126121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560560 + 1560561.

It is an arithmetic number, because the mean of its divisors is an integer number (1560561).

Almost surely, 2^3121121 is an apocalyptic number.

It is an amenable number.

3121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121121 is an equidigital number, since it uses as much as digits as its factorization.

3121121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 11.

The square root of 3121121 is about 1766.6694654066. The cubic root of 3121121 is about 146.1403697852.

Adding to 3121121 its reverse (1211213), we get a palindrome (4332334).

It can be divided in two parts, 3 and 121121, that multiplied together give a palindrome (363363).

The spelling of 3121121 in words is "three million, one hundred twenty-one thousand, one hundred twenty-one".