20111221220113 has 8 divisors (see below), whose sum is σ = 20395147481280. Its totient is φ = 19827313559760.

The previous prime is 20111221220023. The next prime is 20111221220141. The reversal of 20111221220113 is 31102212211102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111221220113 is a prime.

It is a super-2 number, since 2×20111221220113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111221224113) 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, 2465343 + ... + 6804436.

It is an arithmetic number, because the mean of its divisors is an integer number (2549393435160).

Almost surely, 2^{20111221220113} is an apocalyptic number.

It is an amenable number.

20111221220113 is a deficient number, since it is larger than the sum of its proper divisors (283926261167).

20111221220113 is an equidigital number, since it uses as much as digits as its factorization.

20111221220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9300407.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 20111221220113 its reverse (31102212211102), we get a palindrome (51213433431215).

The spelling of 20111221220113 in words is "twenty trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred thirteen".