221020211101110 has 128 divisors (see below), whose sum is σ = 534618689788800. Its totient is φ = 58476523622400.

The previous prime is 221020211101007. The next prime is 221020211101111. The reversal of 221020211101110 is 11101112020122.

It is a happy number.

221020211101110 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 221020211101110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020211101111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22260062626 + ... + 22260072554.

It is an arithmetic number, because the mean of its divisors is an integer number (4176708513975).

Almost surely, 2^{221020211101110} is an apocalyptic number.

221020211101110 is an abundant number, since it is smaller than the sum of its proper divisors (313598478687690).

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

221020211101110 is a wasteful number, since it uses less digits than its factorization.

221020211101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16626.

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

Adding to 221020211101110 its reverse (11101112020122), we get a palindrome (232121323121232).

The spelling of 221020211101110 in words is "two hundred twenty-one trillion, twenty billion, two hundred eleven million, one hundred one thousand, one hundred ten".