10021001221111 has 2 divisors, whose sum is σ = 10021001221112. Its totient is φ = 10021001221110.

The previous prime is 10021001221109. The next prime is 10021001221129. The reversal of 10021001221111 is 11112210012001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10021001221111 - 2¹ = 10021001221109 is a prime.

It is a super-3 number, since 3×10021001221111³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 10021001221109, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 10021001221091 and 10021001221100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021001221811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010500610555 + 5010500610556.

It is an arithmetic number, because the mean of its divisors is an integer number (5010500610556).

Almost surely, 2^{10021001221111} is an apocalyptic number.

10021001221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021001221111 is an equidigital number, since it uses as much as digits as its factorization.

10021001221111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10021001221111 its reverse (11112210012001), we get a palindrome (21133211233112).

The spelling of 10021001221111 in words is "ten trillion, twenty-one billion, one million, two hundred twenty-one thousand, one hundred eleven".