20012212101121 has 8 divisors (see below), whose sum is σ = 20816665669800. Its totient is φ = 19215383685120.

The previous prime is 20012212101097. The next prime is 20012212101149. The reversal of 20012212101121 is 12110121221002.

It can be written as a sum of positive squares in 4 ways, for example, as 2067372362896 + 17944839738225 = 1437836^2 + 4236135^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012212101121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012212101095 and 20012212101104.

It is not an unprimeable number, because it can be changed into a prime (20012212101191) 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 7 ways as a sum of consecutive naturals, for example, 1906282816 + ... + 1906293313.

It is an arithmetic number, because the mean of its divisors is an integer number (2602083208725).

Almost surely, 2^{20012212101121} is an apocalyptic number.

It is an amenable number.

20012212101121 is a deficient number, since it is larger than the sum of its proper divisors (804453568679).

20012212101121 is a wasteful number, since it uses less digits than its factorization.

20012212101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812576339.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20012212101121 its reverse (12110121221002), we get a palindrome (32122333322123).

The spelling of 20012212101121 in words is "twenty trillion, twelve billion, two hundred twelve million, one hundred one thousand, one hundred twenty-one".