1121220121012 has 12 divisors (see below), whose sum is σ = 1965103650916. Its totient is φ = 559761935040.

The previous prime is 1121220120973. The next prime is 1121220121013. The reversal of 1121220121012 is 2101210221211.

It can be written as a sum of positive squares in 2 ways, for example, as 888166765476 + 233053355536 = 942426^2 + 482756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220121013) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 212028393 + ... + 212033680.

Almost surely, 2^{1121220121012} is an apocalyptic number.

It is an amenable number.

1121220121012 is a deficient number, since it is larger than the sum of its proper divisors (843883529904).

1121220121012 is a wasteful number, since it uses less digits than its factorization.

1121220121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424062738 (or 424062736 counting only the distinct ones).

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

Adding to 1121220121012 its reverse (2101210221211), we get a palindrome (3222430342223).

The spelling of 1121220121012 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, twelve".