1213101212 has 6 divisors (see below), whose sum is σ = 2122927128. Its totient is φ = 606550604.

The previous prime is 1213101209. The next prime is 1213101223. The reversal of 1213101212 is 2121013121.

It is a super-2 number, since 2×1213101212² = 2943229101111737888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151637648 + ... + 151637655.

It is an arithmetic number, because the mean of its divisors is an integer number (353821188).

Almost surely, 2^1213101212 is an apocalyptic number.

It is an amenable number.

1213101212 is a deficient number, since it is larger than the sum of its proper divisors (909825916).

1213101212 is a wasteful number, since it uses less digits than its factorization.

1213101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303275307 (or 303275305 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1213101212 is about 34829.6025242896. The cubic root of 1213101212 is about 1066.5118343406.

Adding to 1213101212 its reverse (2121013121), we get a palindrome (3334114333).

The spelling of 1213101212 in words is "one billion, two hundred thirteen million, one hundred one thousand, two hundred twelve".