20112211012 has 24 divisors (see below), whose sum is σ = 38175694200. Its totient is φ = 9233725440.

The previous prime is 20112211003. The next prime is 20112211039. The reversal of 20112211012 is 21011221102.

It can be written as a sum of positive squares in 4 ways, for example, as 6899628096 + 13212582916 = 83064^2 + 114946^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20112210983 and 20112211001.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3604137 + ... + 3609712.

It is an arithmetic number, because the mean of its divisors is an integer number (1590653925).

Almost surely, 2^20112211012 is an apocalyptic number.

It is an amenable number.

20112211012 is a deficient number, since it is larger than the sum of its proper divisors (18063483188).

20112211012 is a wasteful number, since it uses less digits than its factorization.

20112211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7213911 (or 7213909 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20112211012 its reverse (21011221102), we get a palindrome (41123432114).

The spelling of 20112211012 in words is "twenty billion, one hundred twelve million, two hundred eleven thousand, twelve".