221012111000 has 32 divisors (see below), whose sum is σ = 517168342080. Its totient is φ = 88404844000.

The previous prime is 221012110829. The next prime is 221012111039. The reversal of 221012111000 is 111210122.

It is a congruent number.

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, 110505056 + ... + 110507055.

It is an arithmetic number, because the mean of its divisors is an integer number (16161510690).

Almost surely, 2^221012111000 is an apocalyptic number.

221012111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012111000 is an abundant number, since it is smaller than the sum of its proper divisors (296156231080).

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

221012111000 is a wasteful number, since it uses less digits than its factorization.

221012111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221012132 (or 221012118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221012111000 its reverse (111210122), we get a palindrome (221123321122).

The spelling of 221012111000 in words is "two hundred twenty-one billion, twelve million, one hundred eleven thousand".