221201210111000 has 64 divisors (see below), whose sum is σ = 591555236201280. Its totient is φ = 75840414892800.

The previous prime is 221201210110981. The next prime is 221201210111029. The reversal of 221201210111000 is 111012102122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15800079437 + ... + 15800093436.

It is an arithmetic number, because the mean of its divisors is an integer number (9243050565645).

Almost surely, 2^{221201210111000} is an apocalyptic number.

221201210111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201210111000 is an abundant number, since it is smaller than the sum of its proper divisors (370354026090280).

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

221201210111000 is a wasteful number, since it uses less digits than its factorization.

221201210111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31600172901 (or 31600172887 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221201210111000 its reverse (111012102122), we get a palindrome (221312222213122).

The spelling of 221201210111000 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred ten million, one hundred eleven thousand".