400104413021 has 2 divisors, whose sum is σ = 400104413022. Its totient is φ = 400104413020.

The previous prime is 400104413003. The next prime is 400104413113. The reversal of 400104413021 is 120314401004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340722033796 + 59382379225 = 583714^2 + 243685^2 .

It is a cyclic number.

It is not a de Polignac number, because 400104413021 - 2³⁰ = 399030671197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400104412984 and 400104413002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400104412021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200052206510 + 200052206511.

It is an arithmetic number, because the mean of its divisors is an integer number (200052206511).

Almost surely, 2^400104413021 is an apocalyptic number.

It is an amenable number.

400104413021 is a deficient number, since it is larger than the sum of its proper divisors (1).

400104413021 is an equidigital number, since it uses as much as digits as its factorization.

400104413021 is an evil number, because the sum of its binary digits is even.

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

Adding to 400104413021 its reverse (120314401004), we get a palindrome (520418814025).

The spelling of 400104413021 in words is "four hundred billion, one hundred four million, four hundred thirteen thousand, twenty-one".