121312103000 has 128 divisors (see below), whose sum is σ = 314755122240. Its totient is φ = 43390080000.

The previous prime is 121312102981. The next prime is 121312103009. The reversal of 121312103000 is 301213121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312103009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580604 + ... + 761396.

Almost surely, 2^121312103000 is an apocalyptic number.

121312103000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121312103000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157377561120).

121312103000 is an abundant number, since it is smaller than the sum of its proper divisors (193443019240).

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

121312103000 is a wasteful number, since it uses less digits than its factorization.

121312103000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180886 (or 180872 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 121312103000 its reverse (301213121), we get a palindrome (121613316121).

The spelling of 121312103000 in words is "one hundred twenty-one billion, three hundred twelve million, one hundred three thousand".