12221011012 has 36 divisors (see below), whose sum is σ = 24887138220. Its totient is φ = 5235754944.

The previous prime is 12221011001. The next prime is 12221011013. The reversal of 12221011012 is 21011012221.

It can be written as a sum of positive squares in 2 ways, for example, as 10390540356 + 1830470656 = 101934^2 + 42784^2 .

It is a super-2 number, since 2×12221011012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12221010983 and 12221011001.

It is not an unprimeable number, because it can be changed into a prime (12221011013) 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, 659814 + ... + 678082.

It is an arithmetic number, because the mean of its divisors is an integer number (691309395).

Almost surely, 2^12221011012 is an apocalyptic number.

It is an amenable number.

12221011012 is an abundant number, since it is smaller than the sum of its proper divisors (12666127208).

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

12221011012 is a wasteful number, since it uses less digits than its factorization.

12221011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21700 (or 21691 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12221011012 its reverse (21011012221), we get a palindrome (33232023233).

The spelling of 12221011012 in words is "twelve billion, two hundred twenty-one million, eleven thousand, twelve".