2103812505149 has 2 divisors, whose sum is σ = 2103812505150. Its totient is φ = 2103812505148.

The previous prime is 2103812505143. The next prime is 2103812505227. The reversal of 2103812505149 is 9415052183012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1894771521049 + 209040984100 = 1376507^2 + 457210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103812505149 - 2⁴ = 2103812505133 is a prime.

It is a super-2 number, since 2×2103812505149² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2103812505143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051906252574 + 1051906252575.

It is an arithmetic number, because the mean of its divisors is an integer number (1051906252575).

Almost surely, 2^{2103812505149} is an apocalyptic number.

It is an amenable number.

2103812505149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103812505149 is an equidigital number, since it uses as much as digits as its factorization.

2103812505149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 2103812505149 in words is "two trillion, one hundred three billion, eight hundred twelve million, five hundred five thousand, one hundred forty-nine".