20001201011211 has 48 divisors (see below), whose sum is σ = 31933290174720. Its totient is φ = 11095026425280.

The previous prime is 20001201011191. The next prime is 20001201011213. The reversal of 20001201011211 is 11211010210002.

It is not a de Polignac number, because 20001201011211 - 2¹⁸ = 20001200749067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001201011213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1800625 + ... + 6576066.

It is an arithmetic number, because the mean of its divisors is an integer number (665276878640).

Almost surely, 2^{20001201011211} is an apocalyptic number.

20001201011211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20001201011211 is a deficient number, since it is larger than the sum of its proper divisors (11932089163509).

20001201011211 is a wasteful number, since it uses less digits than its factorization.

20001201011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377184 (or 8377177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20001201011211 its reverse (11211010210002), we get a palindrome (31212211221213).

The spelling of 20001201011211 in words is "twenty trillion, one billion, two hundred one million, eleven thousand, two hundred eleven".