1120121001 has 8 divisors (see below), whose sum is σ = 1659438560. Its totient is φ = 746747316.

The previous prime is 1120120997. The next prime is 1120121011. The reversal of 1120121001 is 1001210211.

It is a happy number.

It is not a de Polignac number, because 1120121001 - 2² = 1120120997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1120121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20742955 + ... + 20743008.

It is an arithmetic number, because the mean of its divisors is an integer number (207429820).

Almost surely, 2^1120121001 is an apocalyptic number.

It is an amenable number.

1120121001 is a deficient number, since it is larger than the sum of its proper divisors (539317559).

1120121001 is an equidigital number, since it uses as much as digits as its factorization.

1120121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41485972 (or 41485966 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1120121001 is about 33468.2088107505. The cubic root of 1120121001 is about 1038.5362176532.

Adding to 1120121001 its reverse (1001210211), we get a palindrome (2121331212).

The spelling of 1120121001 in words is "one billion, one hundred twenty million, one hundred twenty-one thousand, one".