221121011020101 has 16 divisors (see below), whose sum is σ = 304999246992000. Its totient is φ = 142328549498688.

The previous prime is 221121011020073. The next prime is 221121011020103. The reversal of 221121011020101 is 101020110121122.

It is a happy number.

221121011020101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221121011020101 - 2⁹ = 221121011019589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121011020103) 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, 14159026 + ... + 25351923.

It is an arithmetic number, because the mean of its divisors is an integer number (19062452937000).

Almost surely, 2^{221121011020101} is an apocalyptic number.

It is an amenable number.

221121011020101 is a deficient number, since it is larger than the sum of its proper divisors (83878235971899).

221121011020101 is a wasteful number, since it uses less digits than its factorization.

221121011020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39575308.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221121011020101 its reverse (101020110121122), we get a palindrome (322141121141223).

The spelling of 221121011020101 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, eleven million, twenty thousand, one hundred one".