1222121121012 has 36 divisors (see below), whose sum is σ = 3370091577216. Its totient is φ = 370339733520.

The previous prime is 1222121120971. The next prime is 1222121121037. The reversal of 1222121121012 is 2101211212221.

1222121121012 is a `hidden beast` number, since 12 + 221 + 211 + 210 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1543081828 + ... + 1543082619.

Almost surely, 2^{1222121121012} is an apocalyptic number.

1222121121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222121121012 is an abundant number, since it is smaller than the sum of its proper divisors (2147970456204).

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

1222121121012 is a wasteful number, since it uses less digits than its factorization.

1222121121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086164468 (or 3086164463 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222121121012 its reverse (2101211212221), we get a palindrome (3323332333233).

The spelling of 1222121121012 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, twelve".