221020211112 has 32 divisors (see below), whose sum is σ = 552642326880. Its totient is φ = 73661163840.

The previous prime is 221020211063. The next prime is 221020211143. The reversal of 221020211112 is 211112020122.

It is a junction number, because it is equal to n+sod(n) for n = 221020211091 and 221020211100.

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, 616939 + ... + 907002.

It is an arithmetic number, because the mean of its divisors is an integer number (17270072715).

Almost surely, 2^221020211112 is an apocalyptic number.

It is an amenable number.

221020211112 is an abundant number, since it is smaller than the sum of its proper divisors (331622115768).

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

221020211112 is a wasteful number, since it uses less digits than its factorization.

221020211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529993 (or 1529989 counting only the distinct ones).

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

Adding to 221020211112 its reverse (211112020122), we get a palindrome (432132231234).

The spelling of 221020211112 in words is "two hundred twenty-one billion, twenty million, two hundred eleven thousand, one hundred twelve".