20131221224011 has 8 divisors (see below), whose sum is σ = 20358234889200. Its totient is φ = 19904225784960.

The previous prime is 20131221223999. The next prime is 20131221224027. The reversal of 20131221224011 is 11042212213102.

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

It is a cyclic number.

It is not a de Polignac number, because 20131221224011 - 2²⁹ = 20130684353099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131221224911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2328925 + ... + 6759166.

It is an arithmetic number, because the mean of its divisors is an integer number (2544779361150).

Almost surely, 2^{20131221224011} is an apocalyptic number.

20131221224011 is a deficient number, since it is larger than the sum of its proper divisors (227013665189).

20131221224011 is an equidigital number, since it uses as much as digits as its factorization.

20131221224011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9113069.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20131221224011 its reverse (11042212213102), we get a palindrome (31173433437113).

The spelling of 20131221224011 in words is "twenty trillion, one hundred thirty-one billion, two hundred twenty-one million, two hundred twenty-four thousand, eleven".