2021047919999 has 16 divisors (see below), whose sum is σ = 2060696671488. Its totient is φ = 1981795909632.

The previous prime is 2021047919981. The next prime is 2021047920007. The reversal of 2021047919999 is 9999197401202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021047919999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021047919899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31722194 + ... + 31785840.

It is an arithmetic number, because the mean of its divisors is an integer number (128793541968).

Almost surely, 2^{2021047919999} is an apocalyptic number.

2021047919999 is a deficient number, since it is larger than the sum of its proper divisors (39648751489).

2021047919999 is a wasteful number, since it uses less digits than its factorization.

2021047919999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66754.

The product of its (nonzero) digits is 6613488, while the sum is 62.

The spelling of 2021047919999 in words is "two trillion, twenty-one billion, forty-seven million, nine hundred nineteen thousand, nine hundred ninety-nine".