1122121123 has 4 divisors (see below), whose sum is σ = 1133689480. Its totient is φ = 1110552768.

The previous prime is 1122121111. The next prime is 1122121129. The reversal of 1122121123 is 3211212211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122121123 is a prime.

It is a super-2 number, since 2×1122121123² = 2518311629365562258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122121097 and 1122121106.

It is not an unprimeable number, because it can be changed into a prime (1122121129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5784033 + ... + 5784226.

It is an arithmetic number, because the mean of its divisors is an integer number (283422370).

Almost surely, 2^1122121123 is an apocalyptic number.

1122121123 is a deficient number, since it is larger than the sum of its proper divisors (11568357).

1122121123 is an equidigital number, since it uses as much as digits as its factorization.

1122121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11568356.

The product of its digits is 48, while the sum is 16.

The square root of 1122121123 is about 33498.0764074596. The cubic root of 1122121123 is about 1039.1539973365.

Adding to 1122121123 its reverse (3211212211), we get a palindrome (4333333334).

The spelling of 1122121123 in words is "one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-three".