121931940000 has 480 divisors, whose sum is σ = 433276107264. Its totient is φ = 29836800000.

The previous prime is 121931939869. The next prime is 121931940017. The reversal of 121931940000 is 49139121.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 121931940000.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 173939650 + ... + 173940350.

Almost surely, 2^121931940000 is an apocalyptic number.

121931940000 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 121931940000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216638053632).

121931940000 is an abundant number, since it is smaller than the sum of its proper divisors (311344167264).

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

121931940000 is a wasteful number, since it uses less digits than its factorization.

121931940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The spelling of 121931940000 in words is "one hundred twenty-one billion, nine hundred thirty-one million, nine hundred forty thousand".