20012021113 has 4 divisors (see below), whose sum is σ = 22870881280. Its totient is φ = 17153160948.

The previous prime is 20012021093. The next prime is 20012021129. The reversal of 20012021113 is 31112021002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-20012021113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012021093 and 20012021102.

It is not an unprimeable number, because it can be changed into a prime (20012021143) 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 3 ways as a sum of consecutive naturals, for example, 1429430073 + ... + 1429430086.

It is an arithmetic number, because the mean of its divisors is an integer number (5717720320).

Almost surely, 2^20012021113 is an apocalyptic number.

It is an amenable number.

20012021113 is a deficient number, since it is larger than the sum of its proper divisors (2858860167).

20012021113 is an equidigital number, since it uses as much as digits as its factorization.

20012021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858860166.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20012021113 its reverse (31112021002), we get a palindrome (51124042115).

The spelling of 20012021113 in words is "twenty billion, twelve million, twenty-one thousand, one hundred thirteen".