1211212112012 has 48 divisors (see below), whose sum is σ = 2500931715072. Its totient is φ = 502272757440.

The previous prime is 1211212112009. The next prime is 1211212112023. The reversal of 1211212112012 is 2102112121121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6067178 + ... + 6263630.

It is an arithmetic number, because the mean of its divisors is an integer number (52102744064).

Almost surely, 2^{1211212112012} is an apocalyptic number.

It is an amenable number.

1211212112012 is an abundant number, since it is smaller than the sum of its proper divisors (1289719603060).

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

1211212112012 is a wasteful number, since it uses less digits than its factorization.

1211212112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203598 (or 203596 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211212112012 its reverse (2102112121121), we get a palindrome (3313324233133).

The spelling of 1211212112012 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred twelve thousand, twelve".