20012011011211 has 4 divisors (see below), whose sum is σ = 20012098815424. Its totient is φ = 20011923207000.

The previous prime is 20012011011143. The next prime is 20012011011277. The reversal of 20012011011211 is 11211011021002.

It is a happy number.

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 20012011011211 - 2²⁹ = 20011474140299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012011011191 and 20012011011200.

It is not an unprimeable number, because it can be changed into a prime (20012011012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43559340 + ... + 44016361.

It is an arithmetic number, because the mean of its divisors is an integer number (5003024703856).

Almost surely, 2^{20012011011211} is an apocalyptic number.

20012011011211 is a deficient number, since it is larger than the sum of its proper divisors (87804213).

20012011011211 is an equidigital number, since it uses as much as digits as its factorization.

20012011011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87804212.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20012011011211 its reverse (11211011021002), we get a palindrome (31223022032213).

The spelling of 20012011011211 in words is "twenty trillion, twelve billion, eleven million, eleven thousand, two hundred eleven".