21120020101011 has 32 divisors (see below), whose sum is σ = 30781907247168. Its totient is φ = 12802931366400.

The previous prime is 21120020100989. The next prime is 21120020101021. The reversal of 21120020101011 is 11010102002112.

It is not a de Polignac number, because 21120020101011 - 2¹⁸ = 21120019838867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120020101021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12832576 + ... + 14384541.

It is an arithmetic number, because the mean of its divisors is an integer number (961934601474).

Almost surely, 2^{21120020101011} is an apocalyptic number.

21120020101011 is a deficient number, since it is larger than the sum of its proper divisors (9661887146157).

21120020101011 is a wasteful number, since it uses less digits than its factorization.

21120020101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27217431.

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

Adding to 21120020101011 its reverse (11010102002112), we get a palindrome (32130122103123).

The spelling of 21120020101011 in words is "twenty-one trillion, one hundred twenty billion, twenty million, one hundred one thousand, eleven".