121143235400 has 192 divisors, whose sum is σ = 309937752000. Its totient is φ = 43670707200.

The previous prime is 121143235387. The next prime is 121143235403. The reversal of 121143235400 is 4532341121.

It is a happy number.

It is a super-3 number, since 3×121143235400³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121143235400.

It is not an unprimeable number, because it can be changed into a prime (121143235403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 163928231 + ... + 163928969.

It is an arithmetic number, because the mean of its divisors is an integer number (1614259125).

Almost surely, 2^121143235400 is an apocalyptic number.

121143235400 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 121143235400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154968876000).

121143235400 is an abundant number, since it is smaller than the sum of its proper divisors (188794516600).

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

121143235400 is a wasteful number, since it uses less digits than its factorization.

121143235400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 121143235400 its reverse (4532341121), we get a palindrome (125675576521).

The spelling of 121143235400 in words is "one hundred twenty-one billion, one hundred forty-three million, two hundred thirty-five thousand, four hundred".