21120022210110 has 16 divisors (see below), whose sum is σ = 50688053304336. Its totient is φ = 5632005922688.

The previous prime is 21120022210081. The next prime is 21120022210193. The reversal of 21120022210110 is 1101222002112.

It is a super-4 number, since 4×21120022210110⁴ (a number of 54 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21120022210110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352000370139 + ... + 352000370198.

It is an arithmetic number, because the mean of its divisors is an integer number (3168003331521).

Almost surely, 2^{21120022210110} is an apocalyptic number.

21120022210110 is an abundant number, since it is smaller than the sum of its proper divisors (29568031094226).

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

21120022210110 is a wasteful number, since it uses less digits than its factorization.

21120022210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704000740347.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120022210110 its reverse (1101222002112), we get a palindrome (22221244212222).

The spelling of 21120022210110 in words is "twenty-one trillion, one hundred twenty billion, twenty-two million, two hundred ten thousand, one hundred ten".