20010020121211 has 4 divisors (see below), whose sum is σ = 20042985558592. Its totient is φ = 19977054683832.

The previous prime is 20010020121197. The next prime is 20010020121229. The reversal of 20010020121211 is 11212102001002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20010020121211 - 2⁴³ = 11213927099003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010020121191 and 20010020121200.

It is not an unprimeable number, because it can be changed into a prime (20010020181211) 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, 16482717780 + ... + 16482718993.

It is an arithmetic number, because the mean of its divisors is an integer number (5010746389648).

Almost surely, 2^{20010020121211} is an apocalyptic number.

20010020121211 is a deficient number, since it is larger than the sum of its proper divisors (32965437381).

20010020121211 is an equidigital number, since it uses as much as digits as its factorization.

20010020121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32965437380.

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

Adding to 20010020121211 its reverse (11212102001002), we get a palindrome (31222122122213).

The spelling of 20010020121211 in words is "twenty trillion, ten billion, twenty million, one hundred twenty-one thousand, two hundred eleven".