221021121001113 has 6 divisors (see below), whose sum is σ = 319252730334954. Its totient is φ = 147347414000736.

The previous prime is 221021121001081. The next prime is 221021121001141. The reversal of 221021121001113 is 311100121120122.

It is a happy number.

221021121001113 is a `hidden beast` number, since 221 + 0 + 211 + 210 + 0 + 11 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 219038904801369 + 1982216199744 = 14799963^2 + 1407912^2 .

It is not a de Polignac number, because 221021121001113 - 2⁵ = 221021121001081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221021121001313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12278951166720 + ... + 12278951166737.

It is an arithmetic number, because the mean of its divisors is an integer number (53208788389159).

Almost surely, 2^{221021121001113} is an apocalyptic number.

It is an amenable number.

221021121001113 is a deficient number, since it is larger than the sum of its proper divisors (98231609333841).

221021121001113 is a wasteful number, since it uses less digits than its factorization.

221021121001113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24557902333463 (or 24557902333460 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 221021121001113 its reverse (311100121120122), we get a palindrome (532121242121235).

The spelling of 221021121001113 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, one thousand, one hundred thirteen".