2120011001028 has 24 divisors (see below), whose sum is σ = 5496324817760. Its totient is φ = 706670333640.

The previous prime is 2120011000993. The next prime is 2120011001029. The reversal of 2120011001028 is 8201001100212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 2120011001028.

It is not an unprimeable number, because it can be changed into a prime (2120011001029) 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, 9814865638 + ... + 9814865853.

Almost surely, 2^{2120011001028} is an apocalyptic number.

It is an amenable number.

2120011001028 is an abundant number, since it is smaller than the sum of its proper divisors (3376313816732).

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

2120011001028 is a wasteful number, since it uses less digits than its factorization.

2120011001028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19629731504 (or 19629731496 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The spelling of 2120011001028 in words is "two trillion, one hundred twenty billion, eleven million, one thousand, twenty-eight".