1208998998020 has 96 divisors (see below), whose sum is σ = 2780342167680. Its totient is φ = 437950402560.

The previous prime is 1208998997993. The next prime is 1208998998029. The reversal of 1208998998020 is 208998998021.

It is not an unprimeable number, because it can be changed into a prime (1208998998029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83011259 + ... + 83025821.

It is an arithmetic number, because the mean of its divisors is an integer number (28961897580).

Almost surely, 2^{1208998998020} is an apocalyptic number.

1208998998020 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 1208998998020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1390171083840).

1208998998020 is an abundant number, since it is smaller than the sum of its proper divisors (1571343169660).

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

1208998998020 is a wasteful number, since it uses less digits than its factorization.

1208998998020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16005 (or 16003 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 65.

Subtracting from 1208998998020 its reverse (208998998021), we obtain a palindrome (999999999999).

The spelling of 1208998998020 in words is "one trillion, two hundred eight billion, nine hundred ninety-eight million, nine hundred ninety-eight thousand, twenty".