400200266021 has 16 divisors (see below), whose sum is σ = 403713160704. Its totient is φ = 396706512384.

The previous prime is 400200266009. The next prime is 400200266027. The reversal of 400200266021 is 120662002004.

It is a cyclic number.

It is not a de Polignac number, because 400200266021 - 2¹⁴ = 400200249637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400200266027) 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, 52813985 + ... + 52821561.

It is an arithmetic number, because the mean of its divisors is an integer number (25232072544).

Almost surely, 2^400200266021 is an apocalyptic number.

It is an amenable number.

400200266021 is a deficient number, since it is larger than the sum of its proper divisors (3512894683).

400200266021 is a wasteful number, since it uses less digits than its factorization.

400200266021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8780.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 400200266021 its reverse (120662002004), we get a palindrome (520862268025).

The spelling of 400200266021 in words is "four hundred billion, two hundred million, two hundred sixty-six thousand, twenty-one".