2101005120073 has 2 divisors, whose sum is σ = 2101005120074. Its totient is φ = 2101005120072.

The previous prime is 2101005120023. The next prime is 2101005120121. The reversal of 2101005120073 is 3700215001012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2037950394624 + 63054725449 = 1427568^2 + 251107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101005120073 is a prime.

It is a super-2 number, since 2×2101005120073² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2101005120023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050502560036 + 1050502560037.

It is an arithmetic number, because the mean of its divisors is an integer number (1050502560037).

Almost surely, 2^{2101005120073} is an apocalyptic number.

It is an amenable number.

2101005120073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101005120073 is an equidigital number, since it uses as much as digits as its factorization.

2101005120073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The spelling of 2101005120073 in words is "two trillion, one hundred one billion, five million, one hundred twenty thousand, seventy-three".