611221220273 has 2 divisors, whose sum is σ = 611221220274. Its totient is φ = 611221220272.

The previous prime is 611221220227. The next prime is 611221220321. The reversal of 611221220273 is 372022122116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423167163169 + 188054057104 = 650513^2 + 433652^2 .

It is a cyclic number.

It is not a de Polignac number, because 611221220273 - 2⁸ = 611221220017 is a prime.

It is a super-2 number, since 2×611221220273² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (611221220213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305610610136 + 305610610137.

It is an arithmetic number, because the mean of its divisors is an integer number (305610610137).

Almost surely, 2^611221220273 is an apocalyptic number.

It is an amenable number.

611221220273 is a deficient number, since it is larger than the sum of its proper divisors (1).

611221220273 is an equidigital number, since it uses as much as digits as its factorization.

611221220273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 611221220273 its reverse (372022122116), we get a palindrome (983243342389).

The spelling of 611221220273 in words is "six hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, two hundred seventy-three".