213122314242 has 40 divisors (see below), whose sum is σ = 478501442496. Its totient is φ = 70899510168.

The previous prime is 213122314219. The next prime is 213122314243. The reversal of 213122314242 is 242413221312.

213122314242 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 231 + 424 + 2 = 666.

It is a super-2 number, since 2×213122314242² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213122314243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1226238 + ... + 1389209.

Almost surely, 2^213122314242 is an apocalyptic number.

213122314242 is an abundant number, since it is smaller than the sum of its proper divisors (265379128254).

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

213122314242 is a wasteful number, since it uses less digits than its factorization.

213122314242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615964 (or 2615955 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 213122314242 its reverse (242413221312), we get a palindrome (455535535554).

The spelling of 213122314242 in words is "two hundred thirteen billion, one hundred twenty-two million, three hundred fourteen thousand, two hundred forty-two".