1012200212221 has 4 divisors (see below), whose sum is σ = 1104218413344. Its totient is φ = 920182011100.

The previous prime is 1012200212189. The next prime is 1012200212249. The reversal of 1012200212221 is 1222120022101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1012200212221 - 2⁵ = 1012200212189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012200212195 and 1012200212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012200212291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46009100545 + ... + 46009100566.

It is an arithmetic number, because the mean of its divisors is an integer number (276054603336).

Almost surely, 2^{1012200212221} is an apocalyptic number.

1012200212221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1012200212221 is a deficient number, since it is larger than the sum of its proper divisors (92018201123).

1012200212221 is an equidigital number, since it uses as much as digits as its factorization.

1012200212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92018201122.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1012200212221 its reverse (1222120022101), we get a palindrome (2234320234322).

The spelling of 1012200212221 in words is "one trillion, twelve billion, two hundred million, two hundred twelve thousand, two hundred twenty-one".