243211000410021 has 32 divisors (see below), whose sum is σ = 374172766044160. Its totient is φ = 137644434902016.

The previous prime is 243211000409989. The next prime is 243211000410083. The reversal of 243211000410021 is 120014000112342.

It is not a de Polignac number, because 243211000410021 - 2⁵ = 243211000409989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243211000410021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243211000412021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77484301 + ... + 80562018.

It is an arithmetic number, because the mean of its divisors is an integer number (11692898938880).

Almost surely, 2^{243211000410021} is an apocalyptic number.

243211000410021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243211000410021 is a deficient number, since it is larger than the sum of its proper divisors (130961765634139).

243211000410021 is a wasteful number, since it uses less digits than its factorization.

243211000410021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158047033.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 243211000410021 its reverse (120014000112342), we get a palindrome (363225000522363).

The spelling of 243211000410021 in words is "two hundred forty-three trillion, two hundred eleven billion, four hundred ten thousand, twenty-one".