1121100121 has 4 divisors (see below), whose sum is σ = 1122188544. Its totient is φ = 1120011700.

The previous prime is 1121100119. The next prime is 1121100133. The reversal of 1121100121 is 1210011211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121100121 - 2¹ = 1121100119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121100098 and 1121100107.

It is not an unprimeable number, because it can be changed into a prime (1121100521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542665 + ... + 544726.

It is an arithmetic number, because the mean of its divisors is an integer number (280547136).

Almost surely, 2^1121100121 is an apocalyptic number.

It is an amenable number.

1121100121 is a deficient number, since it is larger than the sum of its proper divisors (1088423).

1121100121 is a wasteful number, since it uses less digits than its factorization.

1121100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088422.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1121100121 is about 33482.8332283873. The cubic root of 1121100121 is about 1038.8387312331.

Adding to 1121100121 its reverse (1210011211), we get a palindrome (2331111332).

The spelling of 1121100121 in words is "one billion, one hundred twenty-one million, one hundred thousand, one hundred twenty-one".