222121101 has 32 divisors (see below), whose sum is σ = 314202240. Its totient is φ = 139394304.

The previous prime is 222121093. The next prime is 222121117. The reversal of 222121101 is 101121222.

It is not a de Polignac number, because 222121101 - 2³ = 222121093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 825595 + ... + 825863.

It is an arithmetic number, because the mean of its divisors is an integer number (9818820).

Almost surely, 2^222121101 is an apocalyptic number.

It is an amenable number.

222121101 is a deficient number, since it is larger than the sum of its proper divisors (92081139).

222121101 is a wasteful number, since it uses less digits than its factorization.

222121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 222121101 is about 14903.7277551625. The cubic root of 222121101 is about 605.6149756105.

Adding to 222121101 its reverse (101121222), we get a palindrome (323242323).

It can be divided in two parts, 222121 and 101, that added together give a palindrome (222222).

The spelling of 222121101 in words is "two hundred twenty-two million, one hundred twenty-one thousand, one hundred one".