1121001013221 has 16 divisors (see below), whose sum is σ = 1500481825920. Its totient is φ = 744427600640.

The previous prime is 1121001013193. The next prime is 1121001013229. The reversal of 1121001013221 is 1223101001211.

It is a cyclic number.

It is not a de Polignac number, because 1121001013221 - 2¹³ = 1121001005029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121001013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001013229) 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, 10050841 + ... + 10161761.

It is an arithmetic number, because the mean of its divisors is an integer number (93780114120).

Almost surely, 2^{1121001013221} is an apocalyptic number.

It is an amenable number.

1121001013221 is a deficient number, since it is larger than the sum of its proper divisors (379480812699).

1121001013221 is a wasteful number, since it uses less digits than its factorization.

1121001013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123996.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1121001013221 its reverse (1223101001211), we get a palindrome (2344102014432).

The spelling of 1121001013221 in words is "one trillion, one hundred twenty-one billion, one million, thirteen thousand, two hundred twenty-one".