221240031000 has 128 divisors (see below), whose sum is σ = 706322073600. Its totient is φ = 57625276800.

The previous prime is 221240030929. The next prime is 221240031011. The reversal of 221240031000 is 130042122.

It is a super-2 number, since 2×221240031000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728520 + ... + 986519.

It is an arithmetic number, because the mean of its divisors is an integer number (5518141200).

Almost surely, 2^221240031000 is an apocalyptic number.

221240031000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221240031000 is an abundant number, since it is smaller than the sum of its proper divisors (485082042600).

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

221240031000 is a wasteful number, since it uses less digits than its factorization.

221240031000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715106 (or 1715092 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 221240031000 its reverse (130042122), we get a palindrome (221370073122).

The spelling of 221240031000 in words is "two hundred twenty-one billion, two hundred forty million, thirty-one thousand".