20001022011211 has 16 divisors (see below), whose sum is σ = 20589326106624. Its totient is φ = 19419527814624.

The previous prime is 20001022011193. The next prime is 20001022011221. The reversal of 20001022011211 is 11211022010002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001022011211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001022011191 and 20001022011200.

It is not an unprimeable number, because it can be changed into a prime (20001022011221) 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, 66541686 + ... + 66841588.

It is an arithmetic number, because the mean of its divisors is an integer number (1286832881664).

Almost surely, 2^{20001022011211} is an apocalyptic number.

20001022011211 is a deficient number, since it is larger than the sum of its proper divisors (588304095413).

20001022011211 is a wasteful number, since it uses less digits than its factorization.

20001022011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311250.

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

Adding to 20001022011211 its reverse (11211022010002), we get a palindrome (31212044021213).

The spelling of 20001022011211 in words is "twenty trillion, one billion, twenty-two million, eleven thousand, two hundred eleven".