221020220211101 has 16 divisors (see below), whose sum is σ = 232100379586944. Its totient is φ = 210065386179264.

The previous prime is 221020220211083. The next prime is 221020220211163. The reversal of 221020220211101 is 101112022020122.

It is not a de Polignac number, because 221020220211101 - 2³⁴ = 221003040341917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221020220211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020220211181) 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, 28049651 + ... + 35054576.

It is an arithmetic number, because the mean of its divisors is an integer number (14506273724184).

Almost surely, 2^{221020220211101} is an apocalyptic number.

It is an amenable number.

221020220211101 is a deficient number, since it is larger than the sum of its proper divisors (11080159375843).

221020220211101 is a wasteful number, since it uses less digits than its factorization.

221020220211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63105220.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221020220211101 its reverse (101112022020122), we get a palindrome (322132242231223).

The spelling of 221020220211101 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty million, two hundred eleven thousand, one hundred one".