20012211005 has 16 divisors (see below), whose sum is σ = 24092640000. Its totient is φ = 15957865920.

The previous prime is 20012211001. The next prime is 20012211007. The reversal of 20012211005 is 50011221002.

It is not a de Polignac number, because 20012211005 - 2² = 20012211001 is a prime.

It is a super-2 number, since 2×20012211005² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012211001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2047871 + ... + 2057619.

It is an arithmetic number, because the mean of its divisors is an integer number (1505790000).

Almost surely, 2^20012211005 is an apocalyptic number.

It is an amenable number.

20012211005 is a deficient number, since it is larger than the sum of its proper divisors (4080428995).

20012211005 is an equidigital number, since it uses as much as digits as its factorization.

20012211005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 20012211005 its reverse (50011221002), we get a palindrome (70023432007).

The spelling of 20012211005 in words is "twenty billion, twelve million, two hundred eleven thousand, five".