122478900000 has 144 divisors (see below), whose sum is σ = 401859154368. Its totient is φ = 32660960000.

The previous prime is 122478899987. The next prime is 122478900001. The reversal of 122478900000 is 9874221.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (122478900001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95869 + ... + 504131.

It is an arithmetic number, because the mean of its divisors is an integer number (2790688572).

Almost surely, 2^122478900000 is an apocalyptic number.

122478900000 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 122478900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200929577184).

122478900000 is an abundant number, since it is smaller than the sum of its proper divisors (279380254368).

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

122478900000 is an frugal number, since it uses more digits than its factorization.

122478900000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408301 (or 408273 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 122478900000 in words is "one hundred twenty-two billion, four hundred seventy-eight million, nine hundred thousand".