20120121002 has 8 divisors (see below), whose sum is σ = 30214363296. Its totient is φ = 10048666572.

The previous prime is 20120120963. The next prime is 20120121029. The reversal of 20120121002 is 20012102102.

It is a happy number.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5694758 + ... + 5698289.

It is an arithmetic number, because the mean of its divisors is an integer number (3776795412).

Almost surely, 2^20120121002 is an apocalyptic number.

20120121002 is a deficient number, since it is larger than the sum of its proper divisors (10094242294).

20120121002 is a wasteful number, since it uses less digits than its factorization.

20120121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11393932.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20120121002 its reverse (20012102102), we get a palindrome (40132223104).

The spelling of 20120121002 in words is "twenty billion, one hundred twenty million, one hundred twenty-one thousand, two".