121449923616 has 384 divisors, whose sum is σ = 386251407360. Its totient is φ = 32690552832.

The previous prime is 121449923611. The next prime is 121449923627. The reversal of 121449923616 is 616329944121.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (121449923611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 120366120 + ... + 120367128.

It is an arithmetic number, because the mean of its divisors is an integer number (1005863040).

Almost surely, 2^121449923616 is an apocalyptic number.

121449923616 is a gapful number since it is divisible by the number (16) 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 121449923616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193125703680).

121449923616 is an abundant number, since it is smaller than the sum of its proper divisors (264801483744).

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

121449923616 is a wasteful number, since it uses less digits than its factorization.

121449923616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1208 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The spelling of 121449923616 in words is "one hundred twenty-one billion, four hundred forty-nine million, nine hundred twenty-three thousand, six hundred sixteen".