1212211111012 has 24 divisors (see below), whose sum is σ = 2316860078400. Its totient is φ = 550376748960.

The previous prime is 1212211110917. The next prime is 1212211111051. The reversal of 1212211111012 is 2101111122121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15668512 + ... + 15745687.

It is an arithmetic number, because the mean of its divisors is an integer number (96535836600).

Almost surely, 2^{1212211111012} is an apocalyptic number.

It is an amenable number.

1212211111012 is a deficient number, since it is larger than the sum of its proper divisors (1104648967388).

1212211111012 is a wasteful number, since it uses less digits than its factorization.

1212211111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31415091 (or 31415089 counting only the distinct ones).

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

Adding to 1212211111012 its reverse (2101111122121), we get a palindrome (3313322233133).

The spelling of 1212211111012 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred eleven thousand, twelve".