20010020011211 has 4 divisors (see below), whose sum is σ = 20010034649232. Its totient is φ = 20010005373192.

The previous prime is 20010020011171. The next prime is 20010020011217. The reversal of 20010020011211 is 11211002001002.

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 20010020011211 - 2³⁰ = 20008946269387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010020011192 and 20010020011201.

It is not an unprimeable number, because it can be changed into a prime (20010020011217) 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, 5029871 + ... + 8082056.

It is an arithmetic number, because the mean of its divisors is an integer number (5002508662308).

Almost surely, 2^{20010020011211} is an apocalyptic number.

20010020011211 is a deficient number, since it is larger than the sum of its proper divisors (14638021).

20010020011211 is a wasteful number, since it uses less digits than its factorization.

20010020011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14638020.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20010020011211 its reverse (11211002001002), we get a palindrome (31221022012213).

The spelling of 20010020011211 in words is "twenty trillion, ten billion, twenty million, eleven thousand, two hundred eleven".