21220061050111 has 32 divisors (see below), whose sum is σ = 26784122545152. Its totient is φ = 16331409768960.

The previous prime is 21220061050093. The next prime is 21220061050171. The reversal of 21220061050111 is 11105016002212.

It is not a de Polignac number, because 21220061050111 - 2¹³ = 21220061041919 is a prime.

It is a super-2 number, since 2×21220061050111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220061050171) 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, 3236586 + ... + 7274311.

It is an arithmetic number, because the mean of its divisors is an integer number (837003829536).

Almost surely, 2^{21220061050111} is an apocalyptic number.

21220061050111 is a deficient number, since it is larger than the sum of its proper divisors (5564061495041).

21220061050111 is a wasteful number, since it uses less digits than its factorization.

21220061050111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511239.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 21220061050111 its reverse (11105016002212), we get a palindrome (32325077052323).

The spelling of 21220061050111 in words is "twenty-one trillion, two hundred twenty billion, sixty-one million, fifty thousand, one hundred eleven".