221031003012 has 24 divisors (see below), whose sum is σ = 527732938656. Its totient is φ = 71963582208.

The previous prime is 221031002953. The next prime is 221031003013. The reversal of 221031003012 is 210300130122.

It is a junction number, because it is equal to n+sod(n) for n = 221031002982 and 221031003000.

It is not an unprimeable number, because it can be changed into a prime (221031003013) 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, 214176813 + ... + 214177844.

It is an arithmetic number, because the mean of its divisors is an integer number (21988872444).

Almost surely, 2^221031003012 is an apocalyptic number.

It is an amenable number.

221031003012 is an abundant number, since it is smaller than the sum of its proper divisors (306701935644).

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

221031003012 is a wasteful number, since it uses less digits than its factorization.

221031003012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428354707 (or 428354705 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221031003012 its reverse (210300130122), we get a palindrome (431331133134).

The spelling of 221031003012 in words is "two hundred twenty-one billion, thirty-one million, three thousand, twelve".