81212103332323 has 16 divisors (see below), whose sum is σ = 88689086208000. Its totient is φ = 74070677856672.

The previous prime is 81212103332317. The next prime is 81212103332351. The reversal of 81212103332323 is 32323330121218.

It is a cyclic number.

It is not a de Polignac number, because 81212103332323 - 2²⁹ = 81211566461411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81212103335323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212186883 + ... + 212569276.

It is an arithmetic number, because the mean of its divisors is an integer number (5543067888000).

Almost surely, 2^{81212103332323} is an apocalyptic number.

81212103332323 is a deficient number, since it is larger than the sum of its proper divisors (7476982875677).

81212103332323 is a wasteful number, since it uses less digits than its factorization.

81212103332323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424756554.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 81212103332323 in words is "eighty-one trillion, two hundred twelve billion, one hundred three million, three hundred thirty-two thousand, three hundred twenty-three".