210120450555 has 32 divisors (see below), whose sum is σ = 339065895168. Its totient is φ = 111108067200.

The previous prime is 210120450541. The next prime is 210120450557. The reversal of 210120450555 is 555054021012.

It is not a de Polignac number, because 210120450555 - 2¹¹ = 210120448507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210120450557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2147040 + ... + 2242770.

It is an arithmetic number, because the mean of its divisors is an integer number (10595809224).

Almost surely, 2^210120450555 is an apocalyptic number.

210120450555 is a deficient number, since it is larger than the sum of its proper divisors (128945444613).

210120450555 is a wasteful number, since it uses less digits than its factorization.

210120450555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96987.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 210120450555 its reverse (555054021012), we get a palindrome (765174471567).

It can be divided in two parts, 210120 and 450555, that added together give a triangular number (660675 = T₁₁₄₉).

The spelling of 210120450555 in words is "two hundred ten billion, one hundred twenty million, four hundred fifty thousand, five hundred fifty-five".