20012222212013 has 4 divisors (see below), whose sum is σ = 20058439815708. Its totient is φ = 19966004608320.

The previous prime is 20012222212001. The next prime is 20012222212039. The reversal of 20012222212013 is 31021222221002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11685984999529 + 8326237212484 = 3418477^2 + 2885522^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012222212013 - 2¹² = 20012222207917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012222212613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23108801198 + ... + 23108802063.

It is an arithmetic number, because the mean of its divisors is an integer number (5014609953927).

Almost surely, 2^{20012222212013} is an apocalyptic number.

It is an amenable number.

20012222212013 is a deficient number, since it is larger than the sum of its proper divisors (46217603695).

20012222212013 is an equidigital number, since it uses as much as digits as its factorization.

20012222212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46217603694.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20012222212013 its reverse (31021222221002), we get a palindrome (51033444433015).

The spelling of 20012222212013 in words is "twenty trillion, twelve billion, two hundred twenty-two million, two hundred twelve thousand, thirteen".