2105234121155 has 32 divisors (see below), whose sum is σ = 2799927668736. Its totient is φ = 1506723120000.

The previous prime is 2105234121149. The next prime is 2105234121173. The reversal of 2105234121155 is 5511214325012.

It is not a de Polignac number, because 2105234121155 - 2⁶ = 2105234121091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1614350 + ... + 2610860.

It is an arithmetic number, because the mean of its divisors is an integer number (87497739648).

Almost surely, 2^{2105234121155} is an apocalyptic number.

2105234121155 is a deficient number, since it is larger than the sum of its proper divisors (694693547581).

2105234121155 is a wasteful number, since it uses less digits than its factorization.

2105234121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997139.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 2105234121155 its reverse (5511214325012), we get a palindrome (7616448446167).

The spelling of 2105234121155 in words is "two trillion, one hundred five billion, two hundred thirty-four million, one hundred twenty-one thousand, one hundred fifty-five".