212121212012 has 12 divisors (see below), whose sum is σ = 371728415520. Its totient is φ = 105913093296.

The previous prime is 212121211987. The next prime is 212121212021. The reversal of 212121212012 is 210212121212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36874943 + ... + 36880694.

It is an arithmetic number, because the mean of its divisors is an integer number (30977367960).

Almost surely, 2^212121212012 is an apocalyptic number.

It is an amenable number.

212121212012 is a deficient number, since it is larger than the sum of its proper divisors (159607203508).

212121212012 is a wasteful number, since it uses less digits than its factorization.

212121212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73756360 (or 73756358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212121212012 its reverse (210212121212), we get a palindrome (422333333224).

The spelling of 212121212012 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand, twelve".