2011020221173 has 2 divisors, whose sum is σ = 2011020221174. Its totient is φ = 2011020221172.

The previous prime is 2011020221141. The next prime is 2011020221183. The reversal of 2011020221173 is 3711220201102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1858731402609 + 152288818564 = 1363353^2 + 390242^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011020221173 - 2⁵ = 2011020221141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011020221183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005510110586 + 1005510110587.

It is an arithmetic number, because the mean of its divisors is an integer number (1005510110587).

Almost surely, 2^{2011020221173} is an apocalyptic number.

It is an amenable number.

2011020221173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011020221173 is an equidigital number, since it uses as much as digits as its factorization.

2011020221173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 2011020221173 its reverse (3711220201102), we get a palindrome (5722240422275).

The spelling of 2011020221173 in words is "two trillion, eleven billion, twenty million, two hundred twenty-one thousand, one hundred seventy-three".