55121101010 has 32 divisors (see below), whose sum is σ = 101545012800. Its totient is φ = 21531521088.

The previous prime is 55121100989. The next prime is 55121101031. The reversal of 55121101010 is 1010112155.

It is an interprime number because it is at equal distance from previous prime (55121100989) and next prime (55121101031).

It is a self number, because there is not a number n which added to its sum of digits gives 55121101010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3151349 + ... + 3168791.

It is an arithmetic number, because the mean of its divisors is an integer number (3173281650).

Almost surely, 2^55121101010 is an apocalyptic number.

55121101010 is a deficient number, since it is larger than the sum of its proper divisors (46423911790).

55121101010 is a wasteful number, since it uses less digits than its factorization.

55121101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24842.

The product of its (nonzero) digits is 50, while the sum is 17.

Adding to 55121101010 its reverse (1010112155), we get a palindrome (56131213165).

The spelling of 55121101010 in words is "fifty-five billion, one hundred twenty-one million, one hundred one thousand, ten".