100320312212 has 36 divisors (see below), whose sum is σ = 186539689980. Its totient is φ = 47198275584.

The previous prime is 100320312199. The next prime is 100320312217. The reversal of 100320312212 is 212213023001.

It can be written as a sum of positive squares in 6 ways, for example, as 31867962256 + 68452349956 = 178516^2 + 261634^2 .

It is a super-3 number, since 3×100320312212³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100320312217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6712364 + ... + 6727292.

It is an arithmetic number, because the mean of its divisors is an integer number (5181658055).

Almost surely, 2^100320312212 is an apocalyptic number.

It is an amenable number.

100320312212 is a deficient number, since it is larger than the sum of its proper divisors (86219377768).

100320312212 is a wasteful number, since it uses less digits than its factorization.

100320312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20780 (or 20761 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 100320312212 its reverse (212213023001), we get a palindrome (312533335213).

The spelling of 100320312212 in words is "one hundred billion, three hundred twenty million, three hundred twelve thousand, two hundred twelve".