1220121123 has 8 divisors (see below), whose sum is σ = 1751968848. Its totient is φ = 750843744.

The previous prime is 1220121113. The next prime is 1220121137. The reversal of 1220121123 is 3211210221.

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

It is not a de Polignac number, because 1220121123 - 2¹⁸ = 1219858979 is a prime.

It is a super-2 number, since 2×1220121123² = 2977391109581562258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220121113) 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, 15642540 + ... + 15642617.

It is an arithmetic number, because the mean of its divisors is an integer number (218996106).

Almost surely, 2^1220121123 is an apocalyptic number.

1220121123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1220121123 is a deficient number, since it is larger than the sum of its proper divisors (531847725).

1220121123 is a wasteful number, since it uses less digits than its factorization.

1220121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31285173.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1220121123 is about 34930.2322208141. The cubic root of 1220121123 is about 1068.5650905980.

Adding to 1220121123 its reverse (3211210221), we get a palindrome (4431331344).

The spelling of 1220121123 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred twenty-three".