400123011010042 has 32 divisors (see below), whose sum is σ = 603406220640912. Its totient is φ = 198989471798784.

The previous prime is 400123011010013. The next prime is 400123011010043. The reversal of 400123011010042 is 240010110321004.

It can be written as a sum of positive squares in 8 ways, for example, as 143582918446881 + 256540092563161 = 11982609^2 + 16016869^2 .

It is not an unprimeable number, because it can be changed into a prime (400123011010043) 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, 12672932968 + ... + 12672964540.

Almost surely, 2^{400123011010042} is an apocalyptic number.

400123011010042 is a deficient number, since it is larger than the sum of its proper divisors (203283209630870).

400123011010042 is a wasteful number, since it uses less digits than its factorization.

400123011010042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60082.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 400123011010042 its reverse (240010110321004), we get a palindrome (640133121331046).

The spelling of 400123011010042 in words is "four hundred trillion, one hundred twenty-three billion, eleven million, ten thousand, forty-two".