121643156325020 has 192 divisors, whose sum is σ = 280896379545600. Its totient is φ = 43882667520000.

The previous prime is 121643156325011. The next prime is 121643156325037. The reversal of 121643156325020 is 20523651346121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22040793821 + ... + 22040799339.

It is an arithmetic number, because the mean of its divisors is an integer number (1463001976800).

Almost surely, 2^{121643156325020} is an apocalyptic number.

121643156325020 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 121643156325020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140448189772800).

121643156325020 is an abundant number, since it is smaller than the sum of its proper divisors (159253223220580).

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

121643156325020 is a wasteful number, since it uses less digits than its factorization.

121643156325020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7260 (or 7258 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 121643156325020 in words is "one hundred twenty-one trillion, six hundred forty-three billion, one hundred fifty-six million, three hundred twenty-five thousand, twenty".