20111201002128 has 40 divisors (see below), whose sum is σ = 52080962711200. Its totient is φ = 6687343113984.

The previous prime is 20111201002099. The next prime is 20111201002129. The reversal of 20111201002128 is 82120010211102.

It is not an unprimeable number, because it can be changed into a prime (20111201002129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512184958 + ... + 512224221.

It is an arithmetic number, because the mean of its divisors is an integer number (1302024067780).

Almost surely, 2^{20111201002128} is an apocalyptic number.

It is an amenable number.

20111201002128 is an abundant number, since it is smaller than the sum of its proper divisors (31969761709072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111201002128 is a wasteful number, since it uses less digits than its factorization.

20111201002128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024409599 (or 1024409593 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The spelling of 20111201002128 in words is "twenty trillion, one hundred eleven billion, two hundred one million, two thousand, one hundred twenty-eight".