1221120002012 has 6 divisors (see below), whose sum is σ = 2136960003528. Its totient is φ = 610560001004.

The previous prime is 1221120002009. The next prime is 1221120002021. The reversal of 1221120002012 is 2102000211221.

It is a super-2 number, since 2×1221120002012² (a number of 25 digits) contains 22 as substring.

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 as a sum of consecutive naturals, namely, 152640000248 + ... + 152640000255.

It is an arithmetic number, because the mean of its divisors is an integer number (356160000588).

Almost surely, 2^{1221120002012} is an apocalyptic number.

It is an amenable number.

1221120002012 is a deficient number, since it is larger than the sum of its proper divisors (915840001516).

1221120002012 is a wasteful number, since it uses less digits than its factorization.

1221120002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305280000507 (or 305280000505 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221120002012 its reverse (2102000211221), we get a palindrome (3323120213233).

The spelling of 1221120002012 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, two thousand, twelve".