1202120001 has 16 divisors (see below), whose sum is σ = 1858350720. Its totient is φ = 766568880.

The previous prime is 1202119999. The next prime is 1202120021. The reversal of 1202120001 is 1000212021.

It is not a de Polignac number, because 1202120001 - 2¹ = 1202119999 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1202120021) 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, 967270 + ... + 968511.

It is an arithmetic number, because the mean of its divisors is an integer number (116146920).

Almost surely, 2^1202120001 is an apocalyptic number.

It is an amenable number.

1202120001 is a deficient number, since it is larger than the sum of its proper divisors (656230719).

1202120001 is a wasteful number, since it uses less digits than its factorization.

1202120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935813 (or 1935807 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1202120001 is about 34671.6022271830. The cubic root of 1202120001 is about 1063.2839891433.

Adding to 1202120001 its reverse (1000212021), we get a palindrome (2202332022).

The spelling of 1202120001 in words is "one billion, two hundred two million, one hundred twenty thousand, one".