221112011022101 has 8 divisors (see below), whose sum is σ = 237325704015384. Its totient is φ = 205254662929920.

The previous prime is 221112011022047. The next prime is 221112011022131. The reversal of 221112011022101 is 101220110211122.

It can be written as a sum of positive squares in 4 ways, for example, as 147176931722500 + 73935079299601 = 12131650^2 + 8598551^2 .

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

It is not a de Polignac number, because 221112011022101 - 2¹⁸ = 221112010759957 is a prime.

It is a super-2 number, since 2×221112011022101² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 221112011022101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112011022131) 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, 89086223990 + ... + 89086226471.

It is an arithmetic number, because the mean of its divisors is an integer number (29665713001923).

Almost surely, 2^{221112011022101} is an apocalyptic number.

It is an amenable number.

221112011022101 is a deficient number, since it is larger than the sum of its proper divisors (16213692993283).

221112011022101 is a wasteful number, since it uses less digits than its factorization.

221112011022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178172450551.

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

Adding to 221112011022101 its reverse (101220110211122), we get a palindrome (322332121233223).

The spelling of 221112011022101 in words is "two hundred twenty-one trillion, one hundred twelve billion, eleven million, twenty-two thousand, one hundred one".