12221031012 has 24 divisors (see below), whose sum is σ = 28557508896. Its totient is φ = 4067709888.

The previous prime is 12221030981. The next prime is 12221031013. The reversal of 12221031012 is 21013012221.

It is a junction number, because it is equal to n+sod(n) for n = 12221030982 and 12221031000.

It is not an unprimeable number, because it can be changed into a prime (12221031013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737353 + ... + 753744.

It is an arithmetic number, because the mean of its divisors is an integer number (1189896204).

Almost surely, 2^12221031012 is an apocalyptic number.

12221031012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221031012 is an abundant number, since it is smaller than the sum of its proper divisors (16336477884).

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

12221031012 is a wasteful number, since it uses less digits than its factorization.

12221031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491787 (or 1491785 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12221031012 its reverse (21013012221), we get a palindrome (33234043233).

The spelling of 12221031012 in words is "twelve billion, two hundred twenty-one million, thirty-one thousand, twelve".