20121002223 has 32 divisors (see below), whose sum is σ = 32305728000. Its totient is φ = 10881962496.

The previous prime is 20121002221. The next prime is 20121002327. The reversal of 20121002223 is 32220012102.

It is a happy number.

It is not a de Polignac number, because 20121002223 - 2¹ = 20121002221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121002221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394515 + ... + 442587.

It is an arithmetic number, because the mean of its divisors is an integer number (1009554000).

Almost surely, 2^20121002223 is an apocalyptic number.

20121002223 is a deficient number, since it is larger than the sum of its proper divisors (12184725777).

20121002223 is a wasteful number, since it uses less digits than its factorization.

20121002223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49151.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20121002223 its reverse (32220012102), we get a palindrome (52341014325).

The spelling of 20121002223 in words is "twenty billion, one hundred twenty-one million, two thousand, two hundred twenty-three".