213204100242 has 16 divisors (see below), whose sum is σ = 487323657792. Its totient is φ = 60915457200.

The previous prime is 213204100231. The next prime is 213204100243. The reversal of 213204100242 is 242001402312.

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

It is not an unprimeable number, because it can be changed into a prime (213204100243) 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, 2538144009 + ... + 2538144092.

It is an arithmetic number, because the mean of its divisors is an integer number (30457728612).

Almost surely, 2^213204100242 is an apocalyptic number.

213204100242 is an abundant number, since it is smaller than the sum of its proper divisors (274119557550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213204100242 is a wasteful number, since it uses less digits than its factorization.

213204100242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076288113.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 213204100242 its reverse (242001402312), we get a palindrome (455205502554).

The spelling of 213204100242 in words is "two hundred thirteen billion, two hundred four million, one hundred thousand, two hundred forty-two".