20211000221273 has 2 divisors, whose sum is σ = 20211000221274. Its totient is φ = 20211000221272.

The previous prime is 20211000221267. The next prime is 20211000221287. The reversal of 20211000221273 is 37212200011202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15215203044889 + 4995797176384 = 3900667^2 + 2235128^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211000221273 - 2⁸ = 20211000221017 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211000221213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105500110636 + 10105500110637.

It is an arithmetic number, because the mean of its divisors is an integer number (10105500110637).

Almost surely, 2^{20211000221273} is an apocalyptic number.

It is an amenable number.

20211000221273 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211000221273 is an equidigital number, since it uses as much as digits as its factorization.

20211000221273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 20211000221273 its reverse (37212200011202), we get a palindrome (57423200232475).

The spelling of 20211000221273 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one thousand, two hundred seventy-three".