101231203212 has 36 divisors (see below), whose sum is σ = 256205583816. Its totient is φ = 33702117120.

The previous prime is 101231203201. The next prime is 101231203253. The reversal of 101231203212 is 212302132101.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1704453 + ... + 1762844.

Almost surely, 2^101231203212 is an apocalyptic number.

101231203212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101231203212 is an abundant number, since it is smaller than the sum of its proper divisors (154974380604).

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

101231203212 is a wasteful number, since it uses less digits than its factorization.

101231203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468118 (or 3468113 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 101231203212 its reverse (212302132101), we get a palindrome (313533335313).

The spelling of 101231203212 in words is "one hundred one billion, two hundred thirty-one million, two hundred three thousand, two hundred twelve".