220240021212 has 36 divisors (see below), whose sum is σ = 556732151976. Its totient is φ = 73411452000.

The previous prime is 220240021207. The next prime is 220240021217. The reversal of 220240021212 is 212120042022.

220240021212 is a `hidden beast` number, since 220 + 2 + 400 + 21 + 21 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (220240021207) and next prime (220240021217).

It is a tau number, because it is divible by the number of its divisors (36).

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 (220240021217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2480587 + ... + 2567837.

Almost surely, 2^220240021212 is an apocalyptic number.

It is an amenable number.

220240021212 is an abundant number, since it is smaller than the sum of its proper divisors (336492130764).

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

220240021212 is a wasteful number, since it uses less digits than its factorization.

220240021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157378 (or 157373 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 220240021212 its reverse (212120042022), we get a palindrome (432360063234).

The spelling of 220240021212 in words is "two hundred twenty billion, two hundred forty million, twenty-one thousand, two hundred twelve".