81235335122 has 32 divisors (see below), whose sum is σ = 124540416000. Its totient is φ = 39734332560.

The previous prime is 81235335113. The next prime is 81235335127. The reversal of 81235335122 is 22153353218.

It is not an unprimeable number, because it can be changed into a prime (81235335127) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6011129 + ... + 6024627.

It is an arithmetic number, because the mean of its divisors is an integer number (3891888000).

Almost surely, 2^81235335122 is an apocalyptic number.

81235335122 is a deficient number, since it is larger than the sum of its proper divisors (43305080878).

81235335122 is a wasteful number, since it uses less digits than its factorization.

81235335122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13958.

The product of its digits is 43200, while the sum is 35.

The spelling of 81235335122 in words is "eighty-one billion, two hundred thirty-five million, three hundred thirty-five thousand, one hundred twenty-two".