20121002 has 8 divisors (see below), whose sum is σ = 32925312. Its totient is φ = 9145900.

The previous prime is 20120999. The next prime is 20121043. The reversal of 20121002 is 20012102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457274 + ... + 457317.

It is an arithmetic number, because the mean of its divisors is an integer number (4115664).

Almost surely, 2^20121002 is an apocalyptic number.

20121002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121002 is a deficient number, since it is larger than the sum of its proper divisors (12804310).

20121002 is a wasteful number, since it uses less digits than its factorization.

20121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914604.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20121002 is about 4485.6439894401. The cubic root of 20121002 is about 271.9880779809.

Adding to 20121002 its reverse (20012102), we get a palindrome (40133104).

Subtracting from 20121002 its reverse (20012102), we obtain a square (108900 = 330²).

It can be divided in two parts, 2012100 and 2, that added together give a palindrome (2012102).

The spelling of 20121002 in words is "twenty million, one hundred twenty-one thousand, two".