1200121123 has 8 divisors (see below), whose sum is σ = 1255456800. Its totient is φ = 1145715648.

The previous prime is 1200121121. The next prime is 1200121141. The reversal of 1200121123 is 3211210021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200121123 - 2¹ = 1200121121 is a prime.

It is a super-2 number, since 2×1200121123² = 2880581419741562258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200121121) 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 7 ways as a sum of consecutive naturals, for example, 229911 + ... + 235072.

It is an arithmetic number, because the mean of its divisors is an integer number (156932100).

Almost surely, 2^1200121123 is an apocalyptic number.

1200121123 is a deficient number, since it is larger than the sum of its proper divisors (55335677).

1200121123 is an equidigital number, since it uses as much as digits as its factorization.

1200121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465101.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1200121123 is about 34642.7643671806. The cubic root of 1200121123 is about 1062.6943214225.

Adding to 1200121123 its reverse (3211210021), we get a palindrome (4411331144).

It can be divided in two parts, 12001 and 21123, that added together give a square (33124 = 182²).

The spelling of 1200121123 in words is "one billion, two hundred million, one hundred twenty-one thousand, one hundred twenty-three".