221020212012112 has 20 divisors (see below), whose sum is σ = 428244789036640. Its totient is φ = 110505427744608.

The previous prime is 221020212012109. The next prime is 221020212012137. The reversal of 221020212012112 is 211210212020122.

It is a self number, because there is not a number n which added to its sum of digits gives 221020212012112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292001562 + ... + 292757497.

It is an arithmetic number, because the mean of its divisors is an integer number (21412239451832).

Almost surely, 2^{221020212012112} is an apocalyptic number.

It is an amenable number.

221020212012112 is a deficient number, since it is larger than the sum of its proper divisors (207224577024528).

221020212012112 is a wasteful number, since it uses less digits than its factorization.

221020212012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584782690 (or 584782684 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221020212012112 its reverse (211210212020122), we get a palindrome (432230424032234).

The spelling of 221020212012112 in words is "two hundred twenty-one trillion, twenty billion, two hundred twelve million, twelve thousand, one hundred twelve".