1421113331988 has 144 divisors (see below), whose sum is σ = 4245632262144. Its totient is φ = 392215037760.

The previous prime is 1421113331987. The next prime is 1421113331999. The reversal of 1421113331988 is 8891333111241.

1421113331988 is a `hidden beast` number, since 1 + 4 + 211 + 13 + 331 + 98 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421113331987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4106881 + ... + 4439447.

It is an arithmetic number, because the mean of its divisors is an integer number (29483557376).

Almost surely, 2^{1421113331988} is an apocalyptic number.

1421113331988 is a gapful number since it is divisible by the number (18) 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 1421113331988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122816131072).

1421113331988 is an abundant number, since it is smaller than the sum of its proper divisors (2824518930156).

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

1421113331988 is a wasteful number, since it uses less digits than its factorization.

1421113331988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333162 (or 333157 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The spelling of 1421113331988 in words is "one trillion, four hundred twenty-one billion, one hundred thirteen million, three hundred thirty-one thousand, nine hundred eighty-eight".