55121050422 has 16 divisors (see below), whose sum is σ = 122491223280. Its totient is φ = 18373683456.

The previous prime is 55121050421. The next prime is 55121050447. The reversal of 55121050422 is 22405012155.

55121050422 is a `hidden beast` number, since 5 + 512 + 105 + 0 + 42 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121050421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510380043 + ... + 510380150.

It is an arithmetic number, because the mean of its divisors is an integer number (7655701455).

Almost surely, 2^55121050422 is an apocalyptic number.

55121050422 is an abundant number, since it is smaller than the sum of its proper divisors (67370172858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55121050422 is a wasteful number, since it uses less digits than its factorization.

55121050422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020760204 (or 1020760198 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 55121050422 its reverse (22405012155), we get a palindrome (77526062577).

The spelling of 55121050422 in words is "fifty-five billion, one hundred twenty-one million, fifty thousand, four hundred twenty-two".