213112400343421 has 8 divisors (see below), whose sum is σ = 227645312602104. Its totient is φ = 198801364608000.

The previous prime is 213112400343419. The next prime is 213112400343431. The reversal of 213112400343421 is 124343004211312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6539016122500 + 206573384220921 = 2557150^2 + 14372661^2 .

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 213112400343421 - 2¹ = 213112400343419 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 (213112400343431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55469128830 + ... + 55469132671.

It is an arithmetic number, because the mean of its divisors is an integer number (28455664075263).

Almost surely, 2^{213112400343421} is an apocalyptic number.

It is an amenable number.

213112400343421 is a deficient number, since it is larger than the sum of its proper divisors (14532912258683).

213112400343421 is a wasteful number, since it uses less digits than its factorization.

213112400343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110938261631.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 213112400343421 its reverse (124343004211312), we get a palindrome (337455404554733).

The spelling of 213112400343421 in words is "two hundred thirteen trillion, one hundred twelve billion, four hundred million, three hundred forty-three thousand, four hundred twenty-one".