1100222121 has 16 divisors (see below), whose sum is σ = 1509778304. Its totient is φ = 712157184.

The previous prime is 1100222119. The next prime is 1100222131. The reversal of 1100222121 is 1212220011.

It is not a de Polignac number, because 1100222121 - 2¹ = 1100222119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1100222097 and 1100222106.

It is not an unprimeable number, because it can be changed into a prime (1100222131) 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, 43881 + ... + 64233.

It is an arithmetic number, because the mean of its divisors is an integer number (94361144).

Almost surely, 2^1100222121 is an apocalyptic number.

It is an amenable number.

1100222121 is a deficient number, since it is larger than the sum of its proper divisors (409556183).

1100222121 is a wasteful number, since it uses less digits than its factorization.

1100222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20880.

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

The square root of 1100222121 is about 33169.5963345953. The cubic root of 1100222121 is about 1032.3495929290.

Adding to 1100222121 its reverse (1212220011), we get a palindrome (2312442132).

The spelling of 1100222121 in words is "one billion, one hundred million, two hundred twenty-two thousand, one hundred twenty-one".