101223031212 has 72 divisors (see below), whose sum is σ = 265598301696. Its totient is φ = 33708925008.

The previous prime is 101223031207. The next prime is 101223031213. The reversal of 101223031212 is 212130322101.

It is a super-2 number, since 2×101223031212² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (101223031213) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 984253 + ... + 1082219.

Almost surely, 2^101223031212 is an apocalyptic number.

101223031212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101223031212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132799150848).

101223031212 is an abundant number, since it is smaller than the sum of its proper divisors (164375270484).

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

101223031212 is a wasteful number, since it uses less digits than its factorization.

101223031212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99049 (or 99035 counting only the distinct ones).

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

Adding to 101223031212 its reverse (212130322101), we get a palindrome (313353353313).

The spelling of 101223031212 in words is "one hundred one billion, two hundred twenty-three million, thirty-one thousand, two hundred twelve".