20001001011211 has 8 divisors (see below), whose sum is σ = 22031111441664. Its totient is φ = 18006196849320.

The previous prime is 20001001011209. The next prime is 20001001011241. The reversal of 20001001011211 is 11211010010002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001001011211 - 2¹ = 20001001011209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001001011241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8826565951 + ... + 8826568216.

It is an arithmetic number, because the mean of its divisors is an integer number (2753888930208).

Almost surely, 2^{20001001011211} is an apocalyptic number.

20001001011211 is a deficient number, since it is larger than the sum of its proper divisors (2030110430453).

20001001011211 is a wasteful number, since it uses less digits than its factorization.

20001001011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17653134281.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20001001011211 its reverse (11211010010002), we get a palindrome (31212011021213).

The spelling of 20001001011211 in words is "twenty trillion, one billion, one million, eleven thousand, two hundred eleven".