20102211101211 has 4 divisors (see below), whose sum is σ = 26802948134952. Its totient is φ = 13401474067472.

The previous prime is 20102211101197. The next prime is 20102211101243. The reversal of 20102211101211 is 11210111220102.

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 20102211101211 - 2⁷ = 20102211101083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102211101311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3350368516866 + ... + 3350368516871.

It is an arithmetic number, because the mean of its divisors is an integer number (6700737033738).

Almost surely, 2^{20102211101211} is an apocalyptic number.

20102211101211 is a deficient number, since it is larger than the sum of its proper divisors (6700737033741).

20102211101211 is an equidigital number, since it uses as much as digits as its factorization.

20102211101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700737033740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20102211101211 its reverse (11210111220102), we get a palindrome (31312322321313).

The spelling of 20102211101211 in words is "twenty trillion, one hundred two billion, two hundred eleven million, one hundred one thousand, two hundred eleven".