2105154120200 has 48 divisors (see below), whose sum is σ = 4897503505860. Its totient is φ = 841542048000.

The previous prime is 2105154120143. The next prime is 2105154120241. The reversal of 2105154120200 is 20214515012.

It can be written as a sum of positive squares in 6 ways, for example, as 540598444516 + 1564555675684 = 735254^2 + 1250822^2 .

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 11 ways as a sum of consecutive naturals, for example, 2922491 + ... + 3570890.

Almost surely, 2^{2105154120200} is an apocalyptic number.

2105154120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105154120200 is an abundant number, since it is smaller than the sum of its proper divisors (2792349385660).

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

2105154120200 is a wasteful number, since it uses less digits than its factorization.

2105154120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6495018 (or 6495009 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 2105154120200 its reverse (20214515012), we get a palindrome (2125368635212).

The spelling of 2105154120200 in words is "two trillion, one hundred five billion, one hundred fifty-four million, one hundred twenty thousand, two hundred".