1212121222212 has 12 divisors (see below), whose sum is σ = 2828282851856. Its totient is φ = 404040407400.

The previous prime is 1212121222199. The next prime is 1212121222229. The reversal of 1212121222212 is 2122221212121.

It is a tau number, because it is divible by the number of its divisors (12).

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

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, 50505050914 + ... + 50505050937.

Almost surely, 2^{1212121222212} is an apocalyptic number.

1212121222212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212121222212 is an abundant number, since it is smaller than the sum of its proper divisors (1616161629644).

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

1212121222212 is a wasteful number, since it uses less digits than its factorization.

1212121222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101010101858 (or 101010101856 counting only the distinct ones).

The product of its digits is 256, while the sum is 21.

Adding to 1212121222212 its reverse (2122221212121), we get a palindrome (3334342434333).

The spelling of 1212121222212 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".