221030400040 has 32 divisors (see below), whose sum is σ = 497409300360. Its totient is φ = 88396000000.

The previous prime is 221030400037. The next prime is 221030400079. The reversal of 221030400040 is 40004030122.

It can be written as a sum of positive squares in 4 ways, for example, as 211925805316 + 9104594724 = 460354^2 + 95418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221030399987 and 221030400023.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282211 + ... + 722290.

Almost surely, 2^221030400040 is an apocalyptic number.

221030400040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221030400040 is an abundant number, since it is smaller than the sum of its proper divisors (276378900320).

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

221030400040 is a wasteful number, since it uses less digits than its factorization.

221030400040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010013 (or 1010009 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 221030400040 its reverse (40004030122), we get a palindrome (261034430162).

The spelling of 221030400040 in words is "two hundred twenty-one billion, thirty million, four hundred thousand, forty".