2120105553444 has 72 divisors (see below), whose sum is σ = 5607813166592. Its totient is φ = 674536429440.

The previous prime is 2120105553359. The next prime is 2120105553463. The reversal of 2120105553444 is 4443555010212.

2120105553444 is a `hidden beast` number, since 2 + 1 + 20 + 10 + 55 + 534 + 44 = 666.

It is a super-2 number, since 2×2120105553444² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2120105553399 and 2120105553408.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 12930424 + ... + 13093359.

Almost surely, 2^{2120105553444} is an apocalyptic number.

It is an amenable number.

2120105553444 is an abundant number, since it is smaller than the sum of its proper divisors (3487707613148).

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

2120105553444 is a wasteful number, since it uses less digits than its factorization.

2120105553444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023897 (or 26023892 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 2120105553444 in words is "two trillion, one hundred twenty billion, one hundred five million, five hundred fifty-three thousand, four hundred forty-four".