210005554120000 has 70 divisors (see below), whose sum is σ = 520745522511698. Its totient is φ = 84002221632000.

The previous prime is 210005554119961. The next prime is 210005554120013. The reversal of 210005554120000 is 21455500012.

It can be written as a sum of positive squares in 5 ways, for example, as 103820937833536 + 106184616286464 = 10189256^2 + 10304592^2 .

It is a super-2 number, since 2×210005554120000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2625029427 + ... + 2625109426.

Almost surely, 2^{210005554120000} is an apocalyptic number.

210005554120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210005554120000 is an abundant number, since it is smaller than the sum of its proper divisors (310739968391698).

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

210005554120000 is an frugal number, since it uses more digits than its factorization.

210005554120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250138885 (or 5250138860 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 210005554120000 in words is "two hundred ten trillion, five billion, five hundred fifty-four million, one hundred twenty thousand".