81062205022220 has 24 divisors (see below), whose sum is σ = 170450851317264. Its totient is φ = 32382935195456.

The previous prime is 81062205022213. The next prime is 81062205022223. The reversal of 81062205022220 is 2222050226018.

It is not an unprimeable number, because it can be changed into a prime (81062205022223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2621659994 + ... + 2621690913.

It is an arithmetic number, because the mean of its divisors is an integer number (7102118804886).

Almost surely, 2^{81062205022220} is an apocalyptic number.

It is an amenable number.

81062205022220 is an abundant number, since it is smaller than the sum of its proper divisors (89388646295044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81062205022220 is a wasteful number, since it uses less digits than its factorization.

81062205022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5243351689 (or 5243351687 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

Adding to 81062205022220 its reverse (2222050226018), we get a palindrome (83284255248238).

The spelling of 81062205022220 in words is "eighty-one trillion, sixty-two billion, two hundred five million, twenty-two thousand, two hundred twenty".