20101222000121 has 4 divisors (see below), whose sum is σ = 20108974113012. Its totient is φ = 20093469887232.

The previous prime is 20101222000117. The next prime is 20101222000127. The reversal of 20101222000121 is 12100022210102.

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 11255951190121 + 8845270810000 = 3354989^2 + 2974100^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101222000121 - 2² = 20101222000117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20101222000096 and 20101222000105.

It is not an unprimeable number, because it can be changed into a prime (20101222000127) 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, 3876052556 + ... + 3876057741.

It is an arithmetic number, because the mean of its divisors is an integer number (5027243528253).

Almost surely, 2^{20101222000121} is an apocalyptic number.

It is an amenable number.

20101222000121 is a deficient number, since it is larger than the sum of its proper divisors (7752112891).

20101222000121 is an equidigital number, since it uses as much as digits as its factorization.

20101222000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7752112890.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20101222000121 its reverse (12100022210102), we get a palindrome (32201244210223).

It can be divided in two parts, 20101 and 222000121, that added together give a palindrome (222020222).

The spelling of 20101222000121 in words is "twenty trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one", and thus it is an aban number.