20201220113 has 16 divisors (see below), whose sum is σ = 21257779200. Its totient is φ = 19170889920.

The previous prime is 20201220107. The next prime is 20201220119. The reversal of 20201220113 is 31102210202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20201220107) and next prime (20201220119).

It is a cyclic number.

It is not a de Polignac number, because 20201220113 - 2¹⁰ = 20201219089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20201220119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491123 + ... + 530663.

It is an arithmetic number, because the mean of its divisors is an integer number (1328611200).

Almost surely, 2^20201220113 is an apocalyptic number.

It is an amenable number.

20201220113 is a deficient number, since it is larger than the sum of its proper divisors (1056559087).

20201220113 is a wasteful number, since it uses less digits than its factorization.

20201220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39872.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20201220113 its reverse (31102210202), we get a palindrome (51303430315).

The spelling of 20201220113 in words is "twenty billion, two hundred one million, two hundred twenty thousand, one hundred thirteen".