101220031218 has 16 divisors (see below), whose sum is σ = 202621311360. Its totient is φ = 33709802256.

The previous prime is 101220031217. The next prime is 101220031247. The reversal of 101220031218 is 812130022101.

It is a junction number, because it is equal to n+sod(n) for n = 101220031194 and 101220031203.

It is not an unprimeable number, because it can be changed into a prime (101220031217) 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, 7544778 + ... + 7558181.

It is an arithmetic number, because the mean of its divisors is an integer number (12663831960).

Almost surely, 2^101220031218 is an apocalyptic number.

101220031218 is an abundant number, since it is smaller than the sum of its proper divisors (101401280142).

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

101220031218 is a wasteful number, since it uses less digits than its factorization.

101220031218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15104081.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 101220031218 its reverse (812130022101), we get a palindrome (913350053319).

The spelling of 101220031218 in words is "one hundred one billion, two hundred twenty million, thirty-one thousand, two hundred eighteen".