400153042021 has 8 divisors (see below), whose sum is σ = 410312342720. Its totient is φ = 390116884608.

The previous prime is 400153041989. The next prime is 400153042103. The reversal of 400153042021 is 120240351004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400153042021 - 2⁵ = 400153041989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400153041983 and 400153042001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400153043021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30779241 + ... + 30792238.

It is an arithmetic number, because the mean of its divisors is an integer number (51289042840).

Almost surely, 2^400153042021 is an apocalyptic number.

It is an amenable number.

400153042021 is a deficient number, since it is larger than the sum of its proper divisors (10159300699).

400153042021 is an equidigital number, since it uses as much as digits as its factorization.

400153042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61571643.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 400153042021 its reverse (120240351004), we get a palindrome (520393393025).

The spelling of 400153042021 in words is "four hundred billion, one hundred fifty-three million, forty-two thousand, twenty-one".