221026101 has 16 divisors (see below), whose sum is σ = 303366144. Its totient is φ = 143068464.

The previous prime is 221026097. The next prime is 221026111. The reversal of 221026101 is 101620122.

It is not a de Polignac number, because 221026101 - 2² = 221026097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221026111) 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, 11736 + ... + 24078.

It is an arithmetic number, because the mean of its divisors is an integer number (18960384).

Almost surely, 2^221026101 is an apocalyptic number.

It is an amenable number.

221026101 is a deficient number, since it is larger than the sum of its proper divisors (82340043).

221026101 is a wasteful number, since it uses less digits than its factorization.

221026101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12520.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 221026101 is about 14866.9465930298. The cubic root of 221026101 is about 604.6181603496.

Adding to 221026101 its reverse (101620122), we get a palindrome (322646223).

It can be divided in two parts, 22102 and 6101, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 221026101 in words is "two hundred twenty-one million, twenty-six thousand, one hundred one".