100212122 has 4 divisors (see below), whose sum is σ = 150318186.
Its totient is φ = 50106060.
The previous prime is 100212121. The next prime is 100212143. The reversal of 100212122 is 221212001.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221212001 = 31 ⋅7135871.
It can be written as a sum of positive squares in only one way, i.e., 100180081 + 32041 = 10009^2 + 179^2
It is not an unprimeable number, because it can be changed into a prime (100212121) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25053029 + ... + 25053032.
Almost surely, 2100212122 is an apocalyptic number.
100212122 is a deficient number, since it is larger than the sum of its proper divisors (50106064).
100212122 is an equidigital number, since it uses as much as digits as its factorization.
100212122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 50106063.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 100212122 is about 10010.6004814896.
The cubic root of 100212122 is about 464.4868459457.
Adding to 100212122 its reverse (221212001), we get a palindrome (321424123).
The spelling of 100212122 in words is "one hundred million, two hundred twelve thousand, one hundred twenty-two".