2021198706473 has 2 divisors, whose sum is σ = 2021198706474. Its totient is φ = 2021198706472.

The previous prime is 2021198706419. The next prime is 2021198706497. The reversal of 2021198706473 is 3746078911202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1789141657744 + 232057048729 = 1337588^2 + 481723^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021198706473 - 2⁶ = 2021198706409 is a prime.

It is a super-2 number, since 2×2021198706473² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2021198700473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010599353236 + 1010599353237.

It is an arithmetic number, because the mean of its divisors is an integer number (1010599353237).

Almost surely, 2^{2021198706473} is an apocalyptic number.

It is an amenable number.

2021198706473 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021198706473 is an equidigital number, since it uses as much as digits as its factorization.

2021198706473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 2021198706473 in words is "two trillion, twenty-one billion, one hundred ninety-eight million, seven hundred six thousand, four hundred seventy-three".