1120001001221 has 4 divisors (see below), whose sum is σ = 1120021113312. Its totient is φ = 1119980889132.

The previous prime is 1120001001113. The next prime is 1120001001227. The reversal of 1120001001221 is 1221001000211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1120001001221 is a prime.

It is a super-3 number, since 3×1120001001221³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120001001227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9972281 + ... + 10083966.

It is an arithmetic number, because the mean of its divisors is an integer number (280005278328).

Almost surely, 2^{1120001001221} is an apocalyptic number.

It is an amenable number.

1120001001221 is a deficient number, since it is larger than the sum of its proper divisors (20112091).

1120001001221 is an equidigital number, since it uses as much as digits as its factorization.

1120001001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112090.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1120001001221 its reverse (1221001000211), we get a palindrome (2341002001432).

The spelling of 1120001001221 in words is "one trillion, one hundred twenty billion, one million, one thousand, two hundred twenty-one".