61111117222 has 16 divisors (see below), whose sum is σ = 94748079744. Its totient is φ = 29531016000.

The previous prime is 61111117219. The next prime is 61111117247. The reversal of 61111117222 is 22271111116.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600429 + ... + 694792.

It is an arithmetic number, because the mean of its divisors is an integer number (5921754984).

Almost surely, 2^61111117222 is an apocalyptic number.

61111117222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

61111117222 is a deficient number, since it is larger than the sum of its proper divisors (33636962522).

61111117222 is a wasteful number, since it uses less digits than its factorization.

61111117222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296015.

The product of its digits is 336, while the sum is 25.

Adding to 61111117222 its reverse (22271111116), we get a palindrome (83382228338).

The spelling of 61111117222 in words is "sixty-one billion, one hundred eleven million, one hundred seventeen thousand, two hundred twenty-two".