61223305217111 has 2 divisors, whose sum is σ = 61223305217112. Its totient is φ = 61223305217110.

The previous prime is 61223305217059. The next prime is 61223305217149. The reversal of 61223305217111 is 11171250332216.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61223305217111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61223305213111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30611652608555 + 30611652608556.

It is an arithmetic number, because the mean of its divisors is an integer number (30611652608556).

Almost surely, 2^{61223305217111} is an apocalyptic number.

61223305217111 is a deficient number, since it is larger than the sum of its proper divisors (1).

61223305217111 is an equidigital number, since it uses as much as digits as its factorization.

61223305217111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

Adding to 61223305217111 its reverse (11171250332216), we get a palindrome (72394555549327).

The spelling of 61223305217111 in words is "sixty-one trillion, two hundred twenty-three billion, three hundred five million, two hundred seventeen thousand, one hundred eleven".