223101220212 has 120 divisors (see below), whose sum is σ = 628289062632. Its totient is φ = 68625273600.

The previous prime is 223101220211. The next prime is 223101220249. The reversal of 223101220212 is 212022101322.

223101220212 is a `hidden beast` number, since 2 + 231 + 0 + 1 + 220 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 88027329636 + 135073890576 = 296694^2 + 367524^2 .

It is a super-3 number, since 3×223101220212³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223101220211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 18615262 + ... + 18627242.

Almost surely, 2^223101220212 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 223101220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314144531316).

223101220212 is an abundant number, since it is smaller than the sum of its proper divisors (405187842420).

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

223101220212 is a wasteful number, since it uses less digits than its factorization.

223101220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16431 (or 16420 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 223101220212 its reverse (212022101322), we get a palindrome (435123321534).

The spelling of 223101220212 in words is "two hundred twenty-three billion, one hundred one million, two hundred twenty thousand, two hundred twelve".