101221002010111 has 4 divisors (see below), whose sum is σ = 104711381389800. Its totient is φ = 97730622630424.

The previous prime is 101221002010091. The next prime is 101221002010133. The reversal of 101221002010111 is 111010200122101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101221002010111 - 2¹⁵ = 101221001977343 is a prime.

It is a super-3 number, since 3×101221002010111³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221002010091 and 101221002010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221002020111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745189689801 + ... + 1745189689858.

It is an arithmetic number, because the mean of its divisors is an integer number (26177845347450).

Almost surely, 2^{101221002010111} is an apocalyptic number.

101221002010111 is a deficient number, since it is larger than the sum of its proper divisors (3490379379689).

101221002010111 is an equidigital number, since it uses as much as digits as its factorization.

101221002010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490379379688.

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

Adding to 101221002010111 its reverse (111010200122101), we get a palindrome (212231202132212).

The spelling of 101221002010111 in words is "one hundred one trillion, two hundred twenty-one billion, two million, ten thousand, one hundred eleven".