121903511940 has 216 divisors, whose sum is σ = 448921217472. Its totient is φ = 26224542720.

The previous prime is 121903511927. The next prime is 121903512011. The reversal of 121903511940 is 49115309121.

121903511940 is a `hidden beast` number, since 1 + 219 + 0 + 351 + 1 + 94 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 121903511895 and 121903511904.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 196755 + ... + 531525.

Almost surely, 2^121903511940 is an apocalyptic number.

121903511940 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 121903511940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224460608736).

121903511940 is an abundant number, since it is smaller than the sum of its proper divisors (327017705532).

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

121903511940 is a wasteful number, since it uses less digits than its factorization.

121903511940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334827 (or 334805 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The spelling of 121903511940 in words is "one hundred twenty-one billion, nine hundred three million, five hundred eleven thousand, nine hundred forty".