1121330311021 has 16 divisors (see below), whose sum is σ = 1190486631600. Its totient is φ = 1054304294400.

The previous prime is 1121330310983. The next prime is 1121330311037. The reversal of 1121330311021 is 1201130331211.

It can be written as a sum of positive squares in 8 ways, for example, as 141161009796 + 980169301225 = 375714^2 + 990035^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121330311021 - 2¹⁵ = 1121330278253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121330311021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121330311091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228366 + ... + 1514863.

It is an arithmetic number, because the mean of its divisors is an integer number (74405414475).

Almost surely, 2^{1121330311021} is an apocalyptic number.

It is an amenable number.

1121330311021 is a deficient number, since it is larger than the sum of its proper divisors (69156320579).

1121330311021 is a wasteful number, since it uses less digits than its factorization.

1121330311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743840.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1121330311021 its reverse (1201130331211), we get a palindrome (2322460642232).

The spelling of 1121330311021 in words is "one trillion, one hundred twenty-one billion, three hundred thirty million, three hundred eleven thousand, twenty-one".