2102123104040 has 32 divisors (see below), whose sum is σ = 4776606468360. Its totient is φ = 832524000000.

The previous prime is 2102123103943. The next prime is 2102123104049. The reversal of 2102123104040 is 404013212012.

It can be written as a sum of positive squares in 4 ways, for example, as 1568671081156 + 533452022884 = 1252466^2 + 730378^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2102123104049) 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, 260159711 + ... + 260167790.

Almost surely, 2^{2102123104040} is an apocalyptic number.

2102123104040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102123104040 is an abundant number, since it is smaller than the sum of its proper divisors (2674483364320).

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

2102123104040 is a wasteful number, since it uses less digits than its factorization.

2102123104040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520327613 (or 520327609 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2102123104040 its reverse (404013212012), we get a palindrome (2506136316052).

The spelling of 2102123104040 in words is "two trillion, one hundred two billion, one hundred twenty-three million, one hundred four thousand, forty".