21110011110220 has 96 divisors (see below), whose sum is σ = 45128589682176. Its totient is φ = 8293741209600.

The previous prime is 21110011110187. The next prime is 21110011110263. The reversal of 21110011110220 is 2201111001112.

It is a happy number.

It is a super-2 number, since 2×21110011110220² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21110011110220.

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, 118666140 + ... + 118843900.

It is an arithmetic number, because the mean of its divisors is an integer number (470089475856).

Almost surely, 2^{21110011110220} is an apocalyptic number.

21110011110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110011110220 is an abundant number, since it is smaller than the sum of its proper divisors (24018578571956).

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

21110011110220 is a wasteful number, since it uses less digits than its factorization.

21110011110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178351 (or 178349 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110011110220 its reverse (2201111001112), we get a palindrome (23311122111332).

The spelling of 21110011110220 in words is "twenty-one trillion, one hundred ten billion, eleven million, one hundred ten thousand, two hundred twenty".