420821394012 has 48 divisors (see below), whose sum is σ = 1104487815200. Its totient is φ = 140273795088.

The previous prime is 420821394001. The next prime is 420821394013. The reversal of 420821394012 is 210493128024.

420821394012 is a `hidden beast` number, since 42 + 0 + 82 + 139 + 401 + 2 = 666.

It is a super-2 number, since 2×420821394012² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420821394013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24043687 + ... + 24061182.

Almost surely, 2^420821394012 is an apocalyptic number.

It is an amenable number.

420821394012 is an abundant number, since it is smaller than the sum of its proper divisors (683666421188).

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

420821394012 is an equidigital number, since it uses as much as digits as its factorization.

420821394012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48104894 (or 48104874 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 420821394012 in words is "four hundred twenty billion, eight hundred twenty-one million, three hundred ninety-four thousand, twelve".