21012222221012 has 12 divisors (see below), whose sum is σ = 40114242422016. Its totient is φ = 9551010100440.

The previous prime is 21012222220987. The next prime is 21012222221027.

21012222221012 is nontrivially palindromic in base 10.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 238775252468 + ... + 238775252555.

It is an arithmetic number, because the mean of its divisors is an integer number (3342853535168).

Almost surely, 2^{21012222221012} is an apocalyptic number.

21012222221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21012222221012 is a deficient number, since it is larger than the sum of its proper divisors (19102020201004).

21012222221012 is a wasteful number, since it uses less digits than its factorization.

21012222221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477550505038 (or 477550505036 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 2101222 and 2221012, that added together give a palindrome (4322234).

The spelling of 21012222221012 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, twelve".