21120210211011 has 16 divisors (see below), whose sum is σ = 29068834160640. Its totient is φ = 13625868130560.

The previous prime is 21120210210991. The next prime is 21120210211049. The reversal of 21120210211011 is 11011201202112.

It is a happy number.

It is not a de Polignac number, because 21120210211011 - 2¹⁴ = 21120210194627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120210211411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20474526 + ... + 21481308.

It is an arithmetic number, because the mean of its divisors is an integer number (1816802135040).

Almost surely, 2^{21120210211011} is an apocalyptic number.

21120210211011 is a deficient number, since it is larger than the sum of its proper divisors (7948623949629).

21120210211011 is a wasteful number, since it uses less digits than its factorization.

21120210211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232386.

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

Adding to 21120210211011 its reverse (11011201202112), we get a palindrome (32131411413123).

The spelling of 21120210211011 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred eleven thousand, eleven".