20212120101011 has 4 divisors (see below), whose sum is σ = 20267193998112. Its totient is φ = 20157046203912.

The previous prime is 20212120100999. The next prime is 20212120101119. The reversal of 20212120101011 is 11010102121202.

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 20212120101011 - 2¹⁰ = 20212120099987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212120101311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27536948000 + ... + 27536948733.

It is an arithmetic number, because the mean of its divisors is an integer number (5066798499528).

Almost surely, 2^{20212120101011} is an apocalyptic number.

20212120101011 is a deficient number, since it is larger than the sum of its proper divisors (55073897101).

20212120101011 is an equidigital number, since it uses as much as digits as its factorization.

20212120101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55073897100.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20212120101011 its reverse (11010102121202), we get a palindrome (31222222222213).

The spelling of 20212120101011 in words is "twenty trillion, two hundred twelve billion, one hundred twenty million, one hundred one thousand, eleven".