20212101099973 has 2 divisors, whose sum is σ = 20212101099974. Its totient is φ = 20212101099972.

The previous prime is 20212101099941. The next prime is 20212101099991. The reversal of 20212101099973 is 37999010121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13060873124289 + 7151227975684 = 3613983^2 + 2674178^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212101099973 - 2⁵ = 20212101099941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212101009973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106050549986 + 10106050549987.

It is an arithmetic number, because the mean of its divisors is an integer number (10106050549987).

Almost surely, 2^{20212101099973} is an apocalyptic number.

It is an amenable number.

20212101099973 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212101099973 is an equidigital number, since it uses as much as digits as its factorization.

20212101099973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The spelling of 20212101099973 in words is "twenty trillion, two hundred twelve billion, one hundred one million, ninety-nine thousand, nine hundred seventy-three".