1120021001 has 8 divisors (see below), whose sum is σ = 1231463424. Its totient is φ = 1010182320.

The previous prime is 1120020997. The next prime is 1120021003. The reversal of 1120021001 is 1001200211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1120021001 - 2² = 1120020997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1120021001.

It is not an unprimeable number, because it can be changed into a prime (1120021003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399470 + ... + 402263.

It is an arithmetic number, because the mean of its divisors is an integer number (153932928).

Almost surely, 2^1120021001 is an apocalyptic number.

1120021001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1120021001 is a deficient number, since it is larger than the sum of its proper divisors (111442423).

1120021001 is a wasteful number, since it uses less digits than its factorization.

1120021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801871.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1120021001 is about 33466.7148223425. The cubic root of 1120021001 is about 1038.5053112564.

Adding to 1120021001 its reverse (1001200211), we get a palindrome (2121221212).

The spelling of 1120021001 in words is "one billion, one hundred twenty million, twenty-one thousand, one".