2021347072042 has 16 divisors (see below), whose sum is σ = 3070494368640. Its totient is φ = 997849730592.

The previous prime is 2021347071983. The next prime is 2021347072093. The reversal of 2021347072042 is 2402707431202.

It is a junction number, because it is equal to n+sod(n) for n = 2021347071989 and 2021347072007.

It is an unprimeable number.

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, 5523838 + ... + 5878390.

It is an arithmetic number, because the mean of its divisors is an integer number (191905898040).

Almost surely, 2^{2021347072042} is an apocalyptic number.

2021347072042 is a deficient number, since it is larger than the sum of its proper divisors (1049147296598).

2021347072042 is a wasteful number, since it uses less digits than its factorization.

2021347072042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390717.

The product of its (nonzero) digits is 37632, while the sum is 34.

The spelling of 2021347072042 in words is "two trillion, twenty-one billion, three hundred forty-seven million, seventy-two thousand, forty-two".