1021221110200 has 24 divisors (see below), whose sum is σ = 2374339081680. Its totient is φ = 408488444000.

The previous prime is 1021221110183. The next prime is 1021221110219. The reversal of 1021221110200 is 20111221201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2553052576 + ... + 2553052975.

It is an arithmetic number, because the mean of its divisors is an integer number (98930795070).

Almost surely, 2^{1021221110200} is an apocalyptic number.

1021221110200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021221110200 is an abundant number, since it is smaller than the sum of its proper divisors (1353117971480).

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

1021221110200 is a wasteful number, since it uses less digits than its factorization.

1021221110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106105567 (or 5106105558 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021221110200 its reverse (20111221201), we get a palindrome (1041332331401).

The spelling of 1021221110200 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred ten thousand, two hundred".