81283902122 has 8 divisors (see below), whose sum is σ = 124520020416. Its totient is φ = 39777228652.

The previous prime is 81283902097. The next prime is 81283902179. The reversal of 81283902122 is 22120938218.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81283902122² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432361088 + ... + 432361275.

It is an arithmetic number, because the mean of its divisors is an integer number (15565002552).

Almost surely, 2^81283902122 is an apocalyptic number.

81283902122 is a deficient number, since it is larger than the sum of its proper divisors (43236118294).

81283902122 is a wasteful number, since it uses less digits than its factorization.

81283902122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864722412.

The product of its (nonzero) digits is 27648, while the sum is 38.

The spelling of 81283902122 in words is "eighty-one billion, two hundred eighty-three million, nine hundred two thousand, one hundred twenty-two".