21220061050110 has 64 divisors (see below), whose sum is σ = 54856624576320. Its totient is φ = 5222358850560.

The previous prime is 21220061050093. The next prime is 21220061050171. The reversal of 21220061050110 is 1105016002212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3460095 + ... + 7376474.

It is an arithmetic number, because the mean of its divisors is an integer number (857134759005).

Almost surely, 2^{21220061050110} is an apocalyptic number.

21220061050110 is an abundant number, since it is smaller than the sum of its proper divisors (33636563526210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220061050110 is a wasteful number, since it uses less digits than its factorization.

21220061050110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10841613.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 21220061050110 its reverse (1105016002212), we get a palindrome (22325077052322).

The spelling of 21220061050110 in words is "twenty-one trillion, two hundred twenty billion, sixty-one million, fifty thousand, one hundred ten".