20000120121211 has 16 divisors (see below), whose sum is σ = 20217767679648. Its totient is φ = 19783559577600.

The previous prime is 20000120121133. The next prime is 20000120121239. The reversal of 20000120121211 is 11212102100002.

It is a cyclic number.

It is not a de Polignac number, because 20000120121211 - 2²³ = 20000111732603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000120121191 and 20000120121200.

It is not an unprimeable number, because it can be changed into a prime (20000120121011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50673471 + ... + 51066631.

It is an arithmetic number, because the mean of its divisors is an integer number (1263610479978).

Almost surely, 2^{20000120121211} is an apocalyptic number.

20000120121211 is a deficient number, since it is larger than the sum of its proper divisors (217647558437).

20000120121211 is a wasteful number, since it uses less digits than its factorization.

20000120121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394542.

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

Adding to 20000120121211 its reverse (11212102100002), we get a palindrome (31212222221213).

The spelling of 20000120121211 in words is "twenty trillion, one hundred twenty million, one hundred twenty-one thousand, two hundred eleven".