221020111211101 has 8 divisors (see below), whose sum is σ = 225723022614144. Its totient is φ = 216317214635040.

The previous prime is 221020111211071. The next prime is 221020111211113. The reversal of 221020111211101 is 101112111020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221020111211101 - 2¹³ = 221020111202909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020111211161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29568121 + ... + 36281041.

It is an arithmetic number, because the mean of its divisors is an integer number (28215377826768).

Almost surely, 2^{221020111211101} is an apocalyptic number.

It is an amenable number.

221020111211101 is a deficient number, since it is larger than the sum of its proper divisors (4702911403043).

221020111211101 is an equidigital number, since it uses as much as digits as its factorization.

221020111211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7413491.

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

Adding to 221020111211101 its reverse (101112111020122), we get a palindrome (322132222231223).

The spelling of 221020111211101 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, two hundred eleven thousand, one hundred one".