201212021212 has 12 divisors (see below), whose sum is σ = 352417693320. Its totient is φ = 100521251696.

The previous prime is 201212021183. The next prime is 201212021261. The reversal of 201212021212 is 212120212102.

It is a happy number.

It is a congruent number.

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, 21184387 + ... + 21193882.

It is an arithmetic number, because the mean of its divisors is an integer number (29368141110).

Almost surely, 2^201212021212 is an apocalyptic number.

It is an amenable number.

201212021212 is a deficient number, since it is larger than the sum of its proper divisors (151205672108).

201212021212 is a wasteful number, since it uses less digits than its factorization.

201212021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42379460 (or 42379458 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201212021212 its reverse (212120212102), we get a palindrome (413332233314).

The spelling of 201212021212 in words is "two hundred one billion, two hundred twelve million, twenty-one thousand, two hundred twelve".