1243024210121 has 2 divisors, whose sum is σ = 1243024210122. Its totient is φ = 1243024210120.

The previous prime is 1243024210069. The next prime is 1243024210231. The reversal of 1243024210121 is 1210124203421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1011360080896 + 231664129225 = 1005664^2 + 481315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243024210121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243024810121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621512105060 + 621512105061.

It is an arithmetic number, because the mean of its divisors is an integer number (621512105061).

Almost surely, 2^{1243024210121} is an apocalyptic number.

It is an amenable number.

1243024210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243024210121 is an equidigital number, since it uses as much as digits as its factorization.

1243024210121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1243024210121 its reverse (1210124203421), we get a palindrome (2453148413542).

The spelling of 1243024210121 in words is "one trillion, two hundred forty-three billion, twenty-four million, two hundred ten thousand, one hundred twenty-one".