81102210101 has 8 divisors (see below), whose sum is σ = 88548820608. Its totient is φ = 73667880000.

The previous prime is 81102210089. The next prime is 81102210103. The reversal of 81102210101 is 10101220118.

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

It is not a de Polignac number, because 81102210101 - 2⁶ = 81102210037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81102210101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81102210103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3056285 + ... + 3082706.

It is an arithmetic number, because the mean of its divisors is an integer number (11068602576).

Almost surely, 2^81102210101 is an apocalyptic number.

It is an amenable number.

81102210101 is a deficient number, since it is larger than the sum of its proper divisors (7446610507).

81102210101 is a wasteful number, since it uses less digits than its factorization.

81102210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140203.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 81102210101 its reverse (10101220118), we get a palindrome (91203430219).

The spelling of 81102210101 in words is "eighty-one billion, one hundred two million, two hundred ten thousand, one hundred one".