1201120001 has 4 divisors (see below), whose sum is σ = 1205032752. Its totient is φ = 1197207252.

The previous prime is 1201119949. The next prime is 1201120003. The reversal of 1201120001 is 1000211021.

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-1201120001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201120003) 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, 1955915 + ... + 1956528.

It is an arithmetic number, because the mean of its divisors is an integer number (301258188).

Almost surely, 2^1201120001 is an apocalyptic number.

It is an amenable number.

1201120001 is a deficient number, since it is larger than the sum of its proper divisors (3912751).

1201120001 is an equidigital number, since it uses as much as digits as its factorization.

1201120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912750.

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

The square root of 1201120001 is about 34657.1782030794. The cubic root of 1201120001 is about 1062.9890715642.

Adding to 1201120001 its reverse (1000211021), we get a palindrome (2201331022).

The spelling of 1201120001 in words is "one billion, two hundred one million, one hundred twenty thousand, one".