12221202012 has 48 divisors (see below), whose sum is σ = 30204209952. Its totient is φ = 3832750080.

The previous prime is 12221201939. The next prime is 12221202017. The reversal of 12221202012 is 21020212221.

It is a super-2 number, since 2×12221202012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221201982 and 12221202000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221202017) 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, 679212 + ... + 696972.

It is an arithmetic number, because the mean of its divisors is an integer number (629254374).

Almost surely, 2^12221202012 is an apocalyptic number.

12221202012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221202012 is an abundant number, since it is smaller than the sum of its proper divisors (17983007940).

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

12221202012 is a wasteful number, since it uses less digits than its factorization.

12221202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21158 (or 21156 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12221202012 its reverse (21020212221), we get a palindrome (33241414233).

The spelling of 12221202012 in words is "twelve billion, two hundred twenty-one million, two hundred two thousand, twelve".