1111221121012 has 6 divisors (see below), whose sum is σ = 1944636961778. Its totient is φ = 555610560504.

The previous prime is 1111221120979. The next prime is 1111221121057. The reversal of 1111221121012 is 2101211221111.

It can be written as a sum of positive squares in only one way, i.e., 1110148820496 + 1072300516 = 1053636^2 + 32746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138902640123 + ... + 138902640130.

Almost surely, 2^{1111221121012} is an apocalyptic number.

It is an amenable number.

1111221121012 is a deficient number, since it is larger than the sum of its proper divisors (833415840766).

1111221121012 is a wasteful number, since it uses less digits than its factorization.

1111221121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277805280257 (or 277805280255 counting only the distinct ones).

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

Adding to 1111221121012 its reverse (2101211221111), we get a palindrome (3212432342123).

The spelling of 1111221121012 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, twelve".