2001022010128 has 20 divisors (see below), whose sum is σ = 3877024262800. Its totient is φ = 1000499619744.

The previous prime is 2001022010087. The next prime is 2001022010129. The reversal of 2001022010128 is 8210102201002.

It is not an unprimeable number, because it can be changed into a prime (2001022010129) 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, 841051 + ... + 2170117.

It is an arithmetic number, because the mean of its divisors is an integer number (193851213140).

Almost surely, 2^{2001022010128} is an apocalyptic number.

It is an amenable number.

2001022010128 is a deficient number, since it is larger than the sum of its proper divisors (1876002252672).

2001022010128 is a wasteful number, since it uses less digits than its factorization.

2001022010128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423174 (or 1423168 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The spelling of 2001022010128 in words is "two trillion, one billion, twenty-two million, ten thousand, one hundred twenty-eight".