10011212201221 has 8 divisors (see below), whose sum is σ = 12481511315904. Its totient is φ = 7800944572320.

The previous prime is 10011212201149. The next prime is 10011212201231. The reversal of 10011212201221 is 12210221211001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10011212201221 - 2¹¹ = 10011212199173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011212201195 and 10011212201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011212201231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65007871360 + ... + 65007871513.

It is an arithmetic number, because the mean of its divisors is an integer number (1560188914488).

Almost surely, 2^{10011212201221} is an apocalyptic number.

10011212201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10011212201221 is a deficient number, since it is larger than the sum of its proper divisors (2470299114683).

10011212201221 is a wasteful number, since it uses less digits than its factorization.

10011212201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130015742891.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10011212201221 its reverse (12210221211001), we get a palindrome (22221433412222).

The spelling of 10011212201221 in words is "ten trillion, eleven billion, two hundred twelve million, two hundred one thousand, two hundred twenty-one".