421317081612 has 240 divisors, whose sum is σ = 1328739720000. Its totient is φ = 116224512768.

The previous prime is 421317081589. The next prime is 421317081629. The reversal of 421317081612 is 216180713124.

421317081612 is a `hidden beast` number, since 4 + 2 + 1 + 31 + 7 + 0 + 8 + 1 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3157464 + ... + 3288192.

It is an arithmetic number, because the mean of its divisors is an integer number (5536415500).

Almost surely, 2^421317081612 is an apocalyptic number.

421317081612 is a gapful number since it is divisible by the number (42) 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 421317081612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (664369860000).

421317081612 is an abundant number, since it is smaller than the sum of its proper divisors (907422638388).

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

421317081612 is a wasteful number, since it uses less digits than its factorization.

421317081612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130795 (or 130770 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

Adding to 421317081612 its reverse (216180713124), we get a palindrome (637497794736).

The spelling of 421317081612 in words is "four hundred twenty-one billion, three hundred seventeen million, eighty-one thousand, six hundred twelve".