1213011123 has 8 divisors (see below), whose sum is σ = 1654961088. Its totient is φ = 789867624.

The previous prime is 1213011119. The next prime is 1213011133. The reversal of 1213011123 is 3211103121.

It is a happy number.

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

It is not a de Polignac number, because 1213011123 - 2² = 1213011119 is a prime.

It is a super-2 number, since 2×1213011123² = 2942791969043442258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213011133) 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, 4701465 + ... + 4701722.

It is an arithmetic number, because the mean of its divisors is an integer number (206870136).

Almost surely, 2^1213011123 is an apocalyptic number.

1213011123 is a deficient number, since it is larger than the sum of its proper divisors (441949965).

1213011123 is an equidigital number, since it uses as much as digits as its factorization.

1213011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403233.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1213011123 is about 34828.3092182207. The cubic root of 1213011123 is about 1066.4854327614.

Adding to 1213011123 its reverse (3211103121), we get a palindrome (4424114244).

The spelling of 1213011123 in words is "one billion, two hundred thirteen million, eleven thousand, one hundred twenty-three".