21112020001273 has 2 divisors, whose sum is σ = 21112020001274. Its totient is φ = 21112020001272.

The previous prime is 21112020001201. The next prime is 21112020001291. The reversal of 21112020001273 is 37210002021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21111847026169 + 172975104 = 4594763^2 + 13152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112020001273 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112020001073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010000636 + 10556010000637.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010000637).

Almost surely, 2^{21112020001273} is an apocalyptic number.

It is an amenable number.

21112020001273 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112020001273 is an equidigital number, since it uses as much as digits as its factorization.

21112020001273 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21112020001273 its reverse (37210002021112), we get a palindrome (58322022022385).

The spelling of 21112020001273 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one thousand, two hundred seventy-three".