1221210102112 has 144 divisors (see below), whose sum is σ = 3252550031136. Its totient is φ = 439196313600.

The previous prime is 1221210102107. The next prime is 1221210102149. The reversal of 1221210102112 is 2112010121221.

It is a super-2 number, since 2×1221210102112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1380589 + ... + 2085292.

It is an arithmetic number, because the mean of its divisors is an integer number (22587152994).

Almost surely, 2^{1221210102112} is an apocalyptic number.

It is an amenable number.

1221210102112 is an abundant number, since it is smaller than the sum of its proper divisors (2031339929024).

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

1221210102112 is a wasteful number, since it uses less digits than its factorization.

1221210102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465933 (or 3465914 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221210102112 its reverse (2112010121221), we get a palindrome (3333220223333).

The spelling of 1221210102112 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, one hundred two thousand, one hundred twelve".