2102145519973 has 2 divisors, whose sum is σ = 2102145519974. Its totient is φ = 2102145519972.

The previous prime is 2102145519961. The next prime is 2102145520019. The reversal of 2102145519973 is 3799155412012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2081908465924 + 20237054049 = 1442882^2 + 142257^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102145519973 - 2¹⁷ = 2102145388901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102145519953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051072759986 + 1051072759987.

It is an arithmetic number, because the mean of its divisors is an integer number (1051072759987).

Almost surely, 2^{2102145519973} is an apocalyptic number.

It is an amenable number.

2102145519973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102145519973 is an equidigital number, since it uses as much as digits as its factorization.

2102145519973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 2102145519973 in words is "two trillion, one hundred two billion, one hundred forty-five million, five hundred nineteen thousand, nine hundred seventy-three".