1211012111112 has 64 divisors (see below), whose sum is σ = 3208074361920. Its totient is φ = 379634515968.

The previous prime is 1211012111053. The next prime is 1211012111149. The reversal of 1211012111112 is 2111112101121.

It is a junction number, because it is equal to n+sod(n) for n = 1211012111091 and 1211012111100.

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, 602233 + ... + 1668744.

It is an arithmetic number, because the mean of its divisors is an integer number (50126161905).

Almost surely, 2^{1211012111112} is an apocalyptic number.

1211012111112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211012111112 is an abundant number, since it is smaller than the sum of its proper divisors (1997062250808).

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

1211012111112 is a wasteful number, since it uses less digits than its factorization.

1211012111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272310 (or 2272306 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1211012111112 its reverse (2111112101121), we get a palindrome (3322124212233).

Subtracting 1211012111112 from its reverse (2111112101121), we obtain a palindrome (900099990009).

The spelling of 1211012111112 in words is "one trillion, two hundred eleven billion, twelve million, one hundred eleven thousand, one hundred twelve".