55251201353121 has 12 divisors (see below), whose sum is σ = 80931337194240. Its totient is φ = 36315343611960.

The previous prime is 55251201353083. The next prime is 55251201353123. The reversal of 55251201353121 is 12135310215255.

55251201353121 is a `hidden beast` number, since 5 + 5 + 2 + 512 + 0 + 13 + 5 + 3 + 121 = 666.

It is not a de Polignac number, because 55251201353121 - 2⁶ = 55251201353057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55251201353123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43232551281 + ... + 43232552558.

It is an arithmetic number, because the mean of its divisors is an integer number (6744278099520).

Almost surely, 2^{55251201353121} is an apocalyptic number.

It is an amenable number.

55251201353121 is a deficient number, since it is larger than the sum of its proper divisors (25680135841119).

55251201353121 is a wasteful number, since it uses less digits than its factorization.

55251201353121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86465103916 (or 86465103913 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

Adding to 55251201353121 its reverse (12135310215255), we get a palindrome (67386511568376).

The spelling of 55251201353121 in words is "fifty-five trillion, two hundred fifty-one billion, two hundred one million, three hundred fifty-three thousand, one hundred twenty-one".