121310136 has 160 divisors (see below), whose sum is σ = 365904000. Its totient is φ = 37433664.

The previous prime is 121310107. The next prime is 121310141. The reversal of 121310136 is 631013121.

It is a super-2 number, since 2×121310136² = 29432298192676992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 726325 + ... + 726491.

It is an arithmetic number, because the mean of its divisors is an integer number (2286900).

Almost surely, 2^121310136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121310136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182952000).

121310136 is an abundant number, since it is smaller than the sum of its proper divisors (244593864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121310136 is a wasteful number, since it uses less digits than its factorization.

121310136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 121310136 is about 11014.0880693773. The cubic root of 121310136 is about 495.0309622506.

Adding to 121310136 its reverse (631013121), we get a palindrome (752323257).

The spelling of 121310136 in words is "one hundred twenty-one million, three hundred ten thousand, one hundred thirty-six".