2101120501055 has 16 divisors (see below), whose sum is σ = 2560502902464. Its totient is φ = 1654987891200.

The previous prime is 2101120501043. The next prime is 2101120501057. The reversal of 2101120501055 is 5501050211012.

It is not a de Polignac number, because 2101120501055 - 2¹⁸ = 2101120238911 is a prime.

It is a super-2 number, since 2×2101120501055² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2101120501055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101120501057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12228584 + ... + 12399213.

It is an arithmetic number, because the mean of its divisors is an integer number (160031431404).

Almost surely, 2^{2101120501055} is an apocalyptic number.

2101120501055 is a deficient number, since it is larger than the sum of its proper divisors (459382401409).

2101120501055 is a wasteful number, since it uses less digits than its factorization.

2101120501055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24628066.

The product of its (nonzero) digits is 500, while the sum is 23.

Adding to 2101120501055 its reverse (5501050211012), we get a palindrome (7602170712067).

The spelling of 2101120501055 in words is "two trillion, one hundred one billion, one hundred twenty million, five hundred one thousand, fifty-five".