105551251220 has 12 divisors (see below), whose sum is σ = 221657627604. Its totient is φ = 42220500480.

The previous prime is 105551251199. The next prime is 105551251243. The reversal of 105551251220 is 22152155501.

It can be written as a sum of positive squares in 2 ways, for example, as 63344835856 + 42206415364 = 251684^2 + 205442^2 .

It is a super-2 number, since 2×105551251220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638781261 + ... + 2638781300.

It is an arithmetic number, because the mean of its divisors is an integer number (18471468967).

Almost surely, 2^105551251220 is an apocalyptic number.

105551251220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105551251220 is an abundant number, since it is smaller than the sum of its proper divisors (116106376384).

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

105551251220 is a wasteful number, since it uses less digits than its factorization.

105551251220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277562570 (or 5277562568 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 29.

The spelling of 105551251220 in words is "one hundred five billion, five hundred fifty-one million, two hundred fifty-one thousand, two hundred twenty".