1211112211012 has 48 divisors (see below), whose sum is σ = 2449316278080. Its totient is φ = 518209660800.

The previous prime is 1211112210967. The next prime is 1211112211033. The reversal of 1211112211012 is 2101122111121.

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, 4482439 + ... + 4744942.

It is an arithmetic number, because the mean of its divisors is an integer number (51027422460).

Almost surely, 2^{1211112211012} is an apocalyptic number.

It is an amenable number.

1211112211012 is an abundant number, since it is smaller than the sum of its proper divisors (1238204067068).

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

1211112211012 is a wasteful number, since it uses less digits than its factorization.

1211112211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9227572 (or 9227570 counting only the distinct ones).

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

Adding to 1211112211012 its reverse (2101122111121), we get a palindrome (3312234322133).

The spelling of 1211112211012 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred eleven thousand, twelve".