51010622121161 has 2 divisors, whose sum is σ = 51010622121162. Its totient is φ = 51010622121160.

The previous prime is 51010622121091. The next prime is 51010622121211. The reversal of 51010622121161 is 16112122601015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38571316357561 + 12439305763600 = 6210581^2 + 3526940^2 .

It is a cyclic number.

It is not a de Polignac number, because 51010622121161 - 2⁴² = 46612575610057 is a prime.

It is not a weakly prime, because it can be changed into another prime (51010622121961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25505311060580 + 25505311060581.

It is an arithmetic number, because the mean of its divisors is an integer number (25505311060581).

Almost surely, 2^{51010622121161} is an apocalyptic number.

It is an amenable number.

51010622121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51010622121161 is an equidigital number, since it uses as much as digits as its factorization.

51010622121161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

Adding to 51010622121161 its reverse (16112122601015), we get a palindrome (67122744722176).

The spelling of 51010622121161 in words is "fifty-one trillion, ten billion, six hundred twenty-two million, one hundred twenty-one thousand, one hundred sixty-one".