342121212 has 48 divisors (see below), whose sum is σ = 892674720. Its totient is φ = 113308416.

The previous prime is 342121193. The next prime is 342121223. The reversal of 342121212 is 212121243.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6868 + ... + 27044.

It is an arithmetic number, because the mean of its divisors is an integer number (18597390).

Almost surely, 2^342121212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 342121212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446337360).

342121212 is an abundant number, since it is smaller than the sum of its proper divisors (550553508).

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

342121212 is a wasteful number, since it uses less digits than its factorization.

342121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20347 (or 20339 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 342121212 is about 18496.5189157311. The cubic root of 342121212 is about 699.4016737593.

Adding to 342121212 its reverse (212121243), we get a palindrome (554242455).

The spelling of 342121212 in words is "three hundred forty-two million, one hundred twenty-one thousand, two hundred twelve".