1121221001201 has 18 divisors (see below), whose sum is σ = 1332618642738. Its totient is φ = 940598682240.

The previous prime is 1121221001171. The next prime is 1121221001207. The reversal of 1121221001201 is 1021001221211.

It can be written as a sum of positive squares in only one way, i.e., 792002103025 + 329218898176 = 889945^2 + 573776^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1121221001201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121221001207) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5071040 + ... + 5287521.

It is an arithmetic number, because the mean of its divisors is an integer number (74034369041).

Almost surely, 2^{1121221001201} is an apocalyptic number.

It is an amenable number.

1121221001201 is a deficient number, since it is larger than the sum of its proper divisors (211397641537).

1121221001201 is an equidigital number, since it uses as much as digits as its factorization.

1121221001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10358669 (or 10358615 counting only the distinct ones).

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

Adding to 1121221001201 its reverse (1021001221211), we get a palindrome (2142222222412).

The spelling of 1121221001201 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, one thousand, two hundred one".