212404400234401 has 16 divisors (see below), whose sum is σ = 220643505177088. Its totient is φ = 204254433561600.

The previous prime is 212404400234381. The next prime is 212404400234423. The reversal of 212404400234401 is 104432004404212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212404400234401 - 2⁴⁵ = 177220028145569 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212404400234431) 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, 14993115 + ... + 25487296.

It is an arithmetic number, because the mean of its divisors is an integer number (13790219073568).

Almost surely, 2^{212404400234401} is an apocalyptic number.

It is an amenable number.

212404400234401 is a deficient number, since it is larger than the sum of its proper divisors (8239104942687).

212404400234401 is a wasteful number, since it uses less digits than its factorization.

212404400234401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40481512.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 212404400234401 its reverse (104432004404212), we get a palindrome (316836404638613).

The spelling of 212404400234401 in words is "two hundred twelve trillion, four hundred four billion, four hundred million, two hundred thirty-four thousand, four hundred one".