81222901419 has 8 divisors (see below), whose sum is σ = 118142402112. Its totient is φ = 49226000840.

The previous prime is 81222901391. The next prime is 81222901423. The reversal of 81222901419 is 91410922218.

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

It is a cyclic number.

It is not a de Polignac number, because 81222901419 - 2⁹ = 81222900907 is a prime.

It is a super-2 number, since 2×81222901419² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81222901439) 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 in 7 ways as a sum of consecutive naturals, for example, 1230649989 + ... + 1230650054.

It is an arithmetic number, because the mean of its divisors is an integer number (14767800264).

Almost surely, 2^81222901419 is an apocalyptic number.

81222901419 is a deficient number, since it is larger than the sum of its proper divisors (36919500693).

81222901419 is a wasteful number, since it uses less digits than its factorization.

81222901419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2461300057.

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 81222901419 in words is "eighty-one billion, two hundred twenty-two million, nine hundred one thousand, four hundred nineteen".