10212200021221 has 16 divisors (see below), whose sum is σ = 11325499395840. Its totient is φ = 9130634772480.

The previous prime is 10212200021209. The next prime is 10212200021237. The reversal of 10212200021221 is 12212000221201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10212200021221 - 2¹¹ = 10212200019173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10212200021195 and 10212200021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212200028221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22639836 + ... + 23086501.

It is an arithmetic number, because the mean of its divisors is an integer number (707843712240).

Almost surely, 2^{10212200021221} is an apocalyptic number.

10212200021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10212200021221 is a deficient number, since it is larger than the sum of its proper divisors (1113299374619).

10212200021221 is a wasteful number, since it uses less digits than its factorization.

10212200021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45726684.

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

Adding to 10212200021221 its reverse (12212000221201), we get a palindrome (22424200242422).

The spelling of 10212200021221 in words is "ten trillion, two hundred twelve billion, two hundred million, twenty-one thousand, two hundred twenty-one".