1121001012221 has 16 divisors (see below), whose sum is σ = 1204849271808. Its totient is φ = 1039171795200.

The previous prime is 1121001012203. The next prime is 1121001012239. The reversal of 1121001012221 is 1222101001211.

It is an interprime number because it is at equal distance from previous prime (1121001012203) and next prime (1121001012239).

It is a cyclic number.

It is not a de Polignac number, because 1121001012221 - 2²² = 1120996817917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121001012196 and 1121001012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121001012821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764276 + ... + 1681106.

It is an arithmetic number, because the mean of its divisors is an integer number (75303079488).

Almost surely, 2^{1121001012221} is an apocalyptic number.

It is an amenable number.

1121001012221 is a deficient number, since it is larger than the sum of its proper divisors (83848259587).

1121001012221 is a wasteful number, since it uses less digits than its factorization.

1121001012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917932.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121001012221 its reverse (1222101001211), we get a palindrome (2343102013432).

The spelling of 1121001012221 in words is "one trillion, one hundred twenty-one billion, one million, twelve thousand, two hundred twenty-one".