121231230000 has 200 divisors, whose sum is σ = 392655160128. Its totient is φ = 32220576000.

The previous prime is 121231229983. The next prime is 121231230067. The reversal of 121231230000 is 32132121.

It is a tau number, because it is divible by the number of its divisors (200).

It is a super-2 number, since 2×121231230000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9203419 + ... + 9216581.

Almost surely, 2^121231230000 is an apocalyptic number.

121231230000 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 121231230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196327580064).

121231230000 is an abundant number, since it is smaller than the sum of its proper divisors (271423930128).

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

121231230000 is a wasteful number, since it uses less digits than its factorization.

121231230000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13501 (or 13480 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121231230000 its reverse (32132121), we get a palindrome (121263362121).

The spelling of 121231230000 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred thirty thousand".