120011001 has 16 divisors (see below), whose sum is σ = 175104768. Its totient is φ = 72507600.

The previous prime is 120010999. The next prime is 120011009. The reversal of 120011001 is 100110021.

It is not a de Polignac number, because 120011001 - 2¹ = 120010999 is a prime.

It is a super-2 number, since 2×120011001² = 28805280722044002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (120011009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5430 + ... + 16416.

It is an arithmetic number, because the mean of its divisors is an integer number (10944048).

Almost surely, 2^120011001 is an apocalyptic number.

120011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120011001 is a deficient number, since it is larger than the sum of its proper divisors (55093767).

120011001 is a wasteful number, since it uses less digits than its factorization.

120011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11332.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 120011001 is about 10954.9532632504. The cubic root of 120011001 is about 493.2574870716.

Adding to 120011001 its reverse (100110021), we get a palindrome (220121022).

It can be divided in two parts, 1 and 20011001, that added together give a palindrome (20011002).

The spelling of 120011001 in words is "one hundred twenty million, eleven thousand, one".