221020001001011 has 4 divisors (see below), whose sum is σ = 223165826253552. Its totient is φ = 218874175748472.

The previous prime is 221020001001001. The next prime is 221020001001013. The reversal of 221020001001011 is 110100100020122.

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 221020001001011 - 2⁶ = 221020001000947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221020001000983 and 221020001001001.

It is not an unprimeable number, because it can be changed into a prime (221020001001013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072912626116 + ... + 1072912626321.

It is an arithmetic number, because the mean of its divisors is an integer number (55791456563388).

Almost surely, 2^{221020001001011} is an apocalyptic number.

221020001001011 is a deficient number, since it is larger than the sum of its proper divisors (2145825252541).

221020001001011 is a wasteful number, since it uses less digits than its factorization.

221020001001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145825252540.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221020001001011 its reverse (110100100020122), we get a palindrome (331120101021133).

The spelling of 221020001001011 in words is "two hundred twenty-one trillion, twenty billion, one million, one thousand, eleven".