2201021128906 has 16 divisors (see below), whose sum is σ = 3538186729344. Its totient is φ = 1024211946384.

The previous prime is 2201021128849. The next prime is 2201021128907. The reversal of 2201021128906 is 6098211201022.

It is not an unprimeable number, because it can be changed into a prime (2201021128907) 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, 646596750 + ... + 646600153.

It is an arithmetic number, because the mean of its divisors is an integer number (221136670584).

Almost surely, 2^{2201021128906} is an apocalyptic number.

2201021128906 is a deficient number, since it is larger than the sum of its proper divisors (1337165600438).

2201021128906 is a wasteful number, since it uses less digits than its factorization.

2201021128906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293196965.

The product of its (nonzero) digits is 6912, while the sum is 34.

Adding to 2201021128906 its reverse (6098211201022), we get a palindrome (8299232329928).

The spelling of 2201021128906 in words is "two trillion, two hundred one billion, twenty-one million, one hundred twenty-eight thousand, nine hundred six".