221031134000 has 80 divisors (see below), whose sum is σ = 534923191296. Its totient is φ = 88334720000.

The previous prime is 221031133997. The next prime is 221031134017. The reversal of 221031134000 is 431130122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 221031134000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2253992 + ... + 2350008.

Almost surely, 2^221031134000 is an apocalyptic number.

221031134000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221031134000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267461595648).

221031134000 is an abundant number, since it is smaller than the sum of its proper divisors (313892057296).

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

221031134000 is a wasteful number, since it uses less digits than its factorization.

221031134000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97191 (or 97175 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221031134000 its reverse (431130122), we get a palindrome (221462264122).

The spelling of 221031134000 in words is "two hundred twenty-one billion, thirty-one million, one hundred thirty-four thousand".