221020121112101 has 8 divisors (see below), whose sum is σ = 224327633804064. Its totient is φ = 217727956507600.

The previous prime is 221020121112097. The next prime is 221020121112139. The reversal of 221020121112101 is 101211121020122.

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 221020121112101 - 2² = 221020121112097 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 221020121112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020121112601) 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, 3836992850 + ... + 3837050451.

It is an arithmetic number, because the mean of its divisors is an integer number (28040954225508).

Almost surely, 2^{221020121112101} is an apocalyptic number.

It is an amenable number.

221020121112101 is a deficient number, since it is larger than the sum of its proper divisors (3307512691963).

221020121112101 is an equidigital number, since it uses as much as digits as its factorization.

221020121112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674043731.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221020121112101 its reverse (101211121020122), we get a palindrome (322231242132223).

It can be divided in two parts, 221020 and 121112101, that added together give a palindrome (121333121).

The spelling of 221020121112101 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-one million, one hundred twelve thousand, one hundred one".