221022012 has 48 divisors (see below), whose sum is σ = 534643200. Its totient is φ = 71018112.

The previous prime is 221022007. The next prime is 221022017. The reversal of 221022012 is 210220122.

221022012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221022007) and next prime (221022017).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34864 + ... + 40712.

It is an arithmetic number, because the mean of its divisors is an integer number (11138400).

Almost surely, 2^221022012 is an apocalyptic number.

It is an amenable number.

221022012 is an abundant number, since it is smaller than the sum of its proper divisors (313621188).

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

221022012 is a wasteful number, since it uses less digits than its factorization.

221022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970 (or 5968 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 221022012 is about 14866.8090725616. The cubic root of 221022012 is about 604.6144318324.

Adding to 221022012 its reverse (210220122), we get a palindrome (431242134).

It can be divided in two parts, 2 and 21022012, that multiplied together give a palindrome (42044024).

The spelling of 221022012 in words is "two hundred twenty-one million, twenty-two thousand, twelve".