5751611212121 has 2 divisors, whose sum is σ = 5751611212122. Its totient is φ = 5751611212120.

The previous prime is 5751611212073. The next prime is 5751611212129. The reversal of 5751611212121 is 1212121161575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4418593182025 + 1333018030096 = 2102045^2 + 1154564^2 .

It is a cyclic number.

It is not a de Polignac number, because 5751611212121 - 2⁶ = 5751611212057 is a prime.

It is not a weakly prime, because it can be changed into another prime (5751611212129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2875805606060 + 2875805606061.

It is an arithmetic number, because the mean of its divisors is an integer number (2875805606061).

Almost surely, 2^{5751611212121} is an apocalyptic number.

It is an amenable number.

5751611212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5751611212121 is an equidigital number, since it uses as much as digits as its factorization.

5751611212121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 35.

Adding to 5751611212121 its reverse (1212121161575), we get a palindrome (6963732373696).

The spelling of 5751611212121 in words is "five trillion, seven hundred fifty-one billion, six hundred eleven million, two hundred twelve thousand, one hundred twenty-one".