20031221113 has 8 divisors (see below), whose sum is σ = 20683157760. Its totient is φ = 19379645040.

The previous prime is 20031221107. The next prime is 20031221123. The reversal of 20031221113 is 31112213002.

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

It is not a de Polignac number, because 20031221113 - 2²⁵ = 19997666681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031221123) 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 7 ways as a sum of consecutive naturals, for example, 25131 + ... + 201727.

It is an arithmetic number, because the mean of its divisors is an integer number (2585394720).

Almost surely, 2^20031221113 is an apocalyptic number.

It is an amenable number.

20031221113 is a deficient number, since it is larger than the sum of its proper divisors (651936647).

20031221113 is a wasteful number, since it uses less digits than its factorization.

20031221113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180287.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20031221113 its reverse (31112213002), we get a palindrome (51143434115).

The spelling of 20031221113 in words is "twenty billion, thirty-one million, two hundred twenty-one thousand, one hundred thirteen".