3121230322121 has 2 divisors, whose sum is σ = 3121230322122. Its totient is φ = 3121230322120.

The previous prime is 3121230322081. The next prime is 3121230322127. The reversal of 3121230322121 is 1212230321213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3043056958096 + 78173364025 = 1744436^2 + 279595^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121230322121 - 2¹⁸ = 3121230059977 is a prime.

It is a super-2 number, since 2×3121230322121² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3121230322127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560615161060 + 1560615161061.

It is an arithmetic number, because the mean of its divisors is an integer number (1560615161061).

Almost surely, 2^{3121230322121} is an apocalyptic number.

It is an amenable number.

3121230322121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121230322121 is an equidigital number, since it uses as much as digits as its factorization.

3121230322121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 3121230322121 its reverse (1212230321213), we get a palindrome (4333460643334).

The spelling of 3121230322121 in words is "three trillion, one hundred twenty-one billion, two hundred thirty million, three hundred twenty-two thousand, one hundred twenty-one".