121311123 has 8 divisors (see below), whose sum is σ = 166119888. Its totient is φ = 78688224.

The previous prime is 121311121. The next prime is 121311137. The reversal of 121311123 is 321113121.

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 121311123 - 2¹ = 121311121 is a prime.

It is a super-2 number, since 2×121311123² = 29432777127042258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121311121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546336 + ... + 546557.

It is an arithmetic number, because the mean of its divisors is an integer number (20764986).

Almost surely, 2^121311123 is an apocalyptic number.

121311123 is a deficient number, since it is larger than the sum of its proper divisors (44808765).

121311123 is a wasteful number, since it uses less digits than its factorization.

121311123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092933.

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

The square root of 121311123 is about 11014.1328755377. The cubic root of 121311123 is about 495.0323047991.

Adding to 121311123 its reverse (321113121), we get a palindrome (442424244).

The spelling of 121311123 in words is "one hundred twenty-one million, three hundred eleven thousand, one hundred twenty-three".