400413213021 has 16 divisors (see below), whose sum is σ = 565319736000. Its totient is φ = 251226110208.

The previous prime is 400413213019. The next prime is 400413213023. The reversal of 400413213021 is 120312314004.

It is an interprime number because it is at equal distance from previous prime (400413213019) and next prime (400413213023).

It is not a de Polignac number, because 400413213021 - 2¹ = 400413213019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400413213023) 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, 788830 + ... + 1192928.

It is an arithmetic number, because the mean of its divisors is an integer number (35332483500).

Almost surely, 2^400413213021 is an apocalyptic number.

It is an amenable number.

400413213021 is a deficient number, since it is larger than the sum of its proper divisors (164906522979).

400413213021 is a wasteful number, since it uses less digits than its factorization.

400413213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423548.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 400413213021 its reverse (120312314004), we get a palindrome (520725527025).

The spelling of 400413213021 in words is "four hundred billion, four hundred thirteen million, two hundred thirteen thousand, twenty-one".