4000401211522 has 4 divisors (see below), whose sum is σ = 6000601817286. Its totient is φ = 2000200605760.

The previous prime is 4000401211519. The next prime is 4000401211613. The reversal of 4000401211522 is 2251121040004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2185935637081 + 1814465574441 = 1478491^2 + 1347021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4000401211493 and 4000401211502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000100302879 + ... + 1000100302882.

Almost surely, 2^{4000401211522} is an apocalyptic number.

4000401211522 is a deficient number, since it is larger than the sum of its proper divisors (2000200605764).

4000401211522 is a wasteful number, since it uses less digits than its factorization.

4000401211522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000200605763.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 4000401211522 its reverse (2251121040004), we get a palindrome (6251522251526).

The spelling of 4000401211522 in words is "four trillion, four hundred one million, two hundred eleven thousand, five hundred twenty-two".