40121104240040 has 16 divisors (see below), whose sum is σ = 90272484540180. Its totient is φ = 16048441696000.

The previous prime is 40121104240039. The next prime is 40121104240099. The reversal of 40121104240040 is 4004240112104.

It can be written as a sum of positive squares in 2 ways, for example, as 38892859579396 + 1228244660644 = 6236414^2 + 1108262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40121104239988 and 40121104240015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501513802961 + ... + 501513803040.

Almost surely, 2^{40121104240040} is an apocalyptic number.

40121104240040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40121104240040 is an abundant number, since it is smaller than the sum of its proper divisors (50151380300140).

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

40121104240040 is a wasteful number, since it uses less digits than its factorization.

40121104240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003027606012 (or 1003027606008 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 40121104240040 its reverse (4004240112104), we get a palindrome (44125344352144).

The spelling of 40121104240040 in words is "forty trillion, one hundred twenty-one billion, one hundred four million, two hundred forty thousand, forty".