1221112102112 has 48 divisors (see below), whose sum is σ = 2748556631520. Its totient is φ = 523132919808.

The previous prime is 1221112102087. The next prime is 1221112102183. The reversal of 1221112102112 is 2112012111221.

It is a super-2 number, since 2×1221112102112² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 460313 + ... + 1629144.

It is an arithmetic number, because the mean of its divisors is an integer number (57261596490).

Almost surely, 2^{1221112102112} is an apocalyptic number.

It is an amenable number.

1221112102112 is an abundant number, since it is smaller than the sum of its proper divisors (1527444529408).

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

1221112102112 is a wasteful number, since it uses less digits than its factorization.

1221112102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092083 (or 2092075 counting only the distinct ones).

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

Adding to 1221112102112 its reverse (2112012111221), we get a palindrome (3333124213333).

The spelling of 1221112102112 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred two thousand, one hundred twelve".