221001020212011 has 32 divisors (see below), whose sum is σ = 324137092651008. Its totient is φ = 133086260407680.

The previous prime is 221001020211997. The next prime is 221001020212081. The reversal of 221001020212011 is 110212020100122.

It is a de Polignac number, because none of the positive numbers 2^k-221001020212011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001020212081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2381130 + ... + 21158256.

It is an arithmetic number, because the mean of its divisors is an integer number (10129284145344).

Almost surely, 2^{221001020212011} is an apocalyptic number.

221001020212011 is a deficient number, since it is larger than the sum of its proper divisors (103136072438997).

221001020212011 is a wasteful number, since it uses less digits than its factorization.

221001020212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18783611.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221001020212011 its reverse (110212020100122), we get a palindrome (331213040312133).

The spelling of 221001020212011 in words is "two hundred twenty-one trillion, one billion, twenty million, two hundred twelve thousand, eleven".