221210212202112 has 256 divisors, whose sum is σ = 687333710131200. Its totient is φ = 61716398542848.

The previous prime is 221210212202047. The next prime is 221210212202123. The reversal of 221210212202112 is 211202212012122.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 430524814 + ... + 431038322.

It is an arithmetic number, because the mean of its divisors is an integer number (2684897305200).

Almost surely, 2^{221210212202112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221210212202112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343666855065600).

221210212202112 is an abundant number, since it is smaller than the sum of its proper divisors (466123497929088).

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

221210212202112 is a wasteful number, since it uses less digits than its factorization.

221210212202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517303 (or 517291 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221210212202112 its reverse (211202212012122), we get a palindrome (432412424214234).

The spelling of 221210212202112 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twelve million, two hundred two thousand, one hundred twelve".