12121002 has 20 divisors (see below), whose sum is σ = 27160386.
Its totient is φ = 4040280.
The previous prime is 12120989. The next prime is 12121009. The reversal of 12121002 is 20012121.
It can be written as a sum of positive squares in only one way, i.e., 10556001 + 1565001 = 3249^2 + 1251^2
It is a Harshad number since it is a multiple of its sum of digits (9).
It is not an unprimeable number, because it can be changed into a prime (12121009) by changing a digit.
It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 37249 + ... + 37572.
Almost surely, 212121002 is an apocalyptic number.
12121002 is an abundant number, since it is smaller than the sum of its proper divisors (15039384).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12121002 is an equidigital number, since it uses as much as digits as its factorization.
12121002 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 74835 (or 74826 counting only the distinct ones).
The product of its (nonzero) digits is 8, while the sum is 9.
The square root of 12121002 is about 3481.5229426215.
The cubic root of 12121002 is about 229.7097915058.
Adding to 12121002 its reverse (20012121), we get a palindrome (32133123).
The spelling of 12121002 in words is "twelve million, one hundred twenty-one thousand, two".