2105144133240 has 32 divisors (see below), whose sum is σ = 6315432400080. Its totient is φ = 561371768832.

The previous prime is 2105144133233. The next prime is 2105144133247. The reversal of 2105144133240 is 423314415012.

It is an interprime number because it is at equal distance from previous prime (2105144133233) and next prime (2105144133247).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2105144133198 and 2105144133207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105144133247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8771433769 + ... + 8771434008.

Almost surely, 2^{2105144133240} is an apocalyptic number.

2105144133240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105144133240 is an abundant number, since it is smaller than the sum of its proper divisors (4210288266840).

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

2105144133240 is a wasteful number, since it uses less digits than its factorization.

2105144133240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17542867791 (or 17542867787 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 2105144133240 its reverse (423314415012), we get a palindrome (2528458548252).

The spelling of 2105144133240 in words is "two trillion, one hundred five billion, one hundred forty-four million, one hundred thirty-three thousand, two hundred forty".