61522112111 has 2 divisors, whose sum is σ = 61522112112. Its totient is φ = 61522112110.

The previous prime is 61522112087. The next prime is 61522112131. The reversal of 61522112111 is 11121122516.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61522112111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61522112131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30761056055 + 30761056056.

It is an arithmetic number, because the mean of its divisors is an integer number (30761056056).

Almost surely, 2^61522112111 is an apocalyptic number.

61522112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

61522112111 is an equidigital number, since it uses as much as digits as its factorization.

61522112111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 23.

Adding to 61522112111 its reverse (11121122516), we get a palindrome (72643234627).

The spelling of 61522112111 in words is "sixty-one billion, five hundred twenty-two million, one hundred twelve thousand, one hundred eleven".