1012100520040 has 64 divisors (see below), whose sum is σ = 2289848078160. Its totient is φ = 402602403840.

The previous prime is 1012100520029. The next prime is 1012100520049. The reversal of 1012100520040 is 400250012101.

1012100520040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 66581545156 + 945518974884 = 258034^2 + 972378^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1012100519996 and 1012100520023.

It is not an unprimeable number, because it can be changed into a prime (1012100520049) 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, 5243484 + ... + 5433076.

Almost surely, 2^{1012100520040} is an apocalyptic number.

1012100520040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012100520040 is an abundant number, since it is smaller than the sum of its proper divisors (1277747558120).

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

1012100520040 is a wasteful number, since it uses less digits than its factorization.

1012100520040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190342 (or 190338 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 1012100520040 its reverse (400250012101), we get a palindrome (1412350532141).

The spelling of 1012100520040 in words is "one trillion, twelve billion, one hundred million, five hundred twenty thousand, forty".