100021221112 has 32 divisors (see below), whose sum is σ = 195808816800.
Its totient is φ = 47808095104.
The previous prime is 100021221077. The next prime is 100021221119. The reversal of 100021221112 is 211122120001.
It is a junction number, because it is equal to n+sod(n) for n = 100021221092 and 100021221101.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (100021221119) 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, 155418 + ... + 473494.
It is an arithmetic number, because the mean of its divisors is an integer number (6119025525).
Almost surely, 2100021221112 is an apocalyptic number.
It is an amenable number.
100021221112 is a deficient number, since it is larger than the sum of its proper divisors (95787595688).
100021221112 is a wasteful number, since it uses less digits than its factorization.
100021221112 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 319815 (or 319811 counting only the distinct ones).
The product of its (nonzero) digits is 16, while the sum is 13.
Adding to 100021221112 its reverse (211122120001), we get a palindrome (311143341113).
The spelling of 100021221112 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, one hundred twelve".