1121212202123 has 4 divisors (see below), whose sum is σ = 1207459294608. Its totient is φ = 1034965109640.

The previous prime is 1121212202119. The next prime is 1121212202161. The reversal of 1121212202123 is 3212022121211.

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

It is a cyclic number.

It is not a de Polignac number, because 1121212202123 - 2² = 1121212202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121212202095 and 1121212202104.

It is not an unprimeable number, because it can be changed into a prime (1121212202423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43123546223 + ... + 43123546248.

It is an arithmetic number, because the mean of its divisors is an integer number (301864823652).

Almost surely, 2^{1121212202123} is an apocalyptic number.

1121212202123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1121212202123 is a deficient number, since it is larger than the sum of its proper divisors (86247092485).

1121212202123 is an equidigital number, since it uses as much as digits as its factorization.

1121212202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86247092484.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1121212202123 its reverse (3212022121211), we get a palindrome (4333234323334).

The spelling of 1121212202123 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, one hundred twenty-three".