10011012212221 has 8 divisors (see below), whose sum is σ = 10063785552440. Its totient is φ = 9958248179712.

The previous prime is 10011012212209. The next prime is 10011012212249. The reversal of 10011012212221 is 12221221011001.

It can be written as a sum of positive squares in 4 ways, for example, as 870276288996 + 9140735923225 = 932886^2 + 3023365^2 .

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 10011012212221 - 2⁵ = 10011012212189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011012212195 and 10011012212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011012212291) 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, 164856 + ... + 4477633.

It is an arithmetic number, because the mean of its divisors is an integer number (1257973194055).

Almost surely, 2^{10011012212221} is an apocalyptic number.

It is an amenable number.

10011012212221 is a deficient number, since it is larger than the sum of its proper divisors (52773340219).

10011012212221 is a wasteful number, since it uses less digits than its factorization.

10011012212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4653855.

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

Adding to 10011012212221 its reverse (12221221011001), we get a palindrome (22232233223222).

The spelling of 10011012212221 in words is "ten trillion, eleven billion, twelve million, two hundred twelve thousand, two hundred twenty-one".