421317006665220 has 72 divisors (see below), whose sum is σ = 1283575684187160. Its totient is φ = 111860585164800.

The previous prime is 421317006665209. The next prime is 421317006665339. The reversal of 421317006665220 is 22566600713124.

It can be written as a sum of positive squares in 4 ways, for example, as 140994583284996 + 280322423380224 = 11874114^2 + 16742832^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5110548381 + ... + 5110630820.

It is an arithmetic number, because the mean of its divisors is an integer number (17827440058155).

Almost surely, 2^{421317006665220} is an apocalyptic number.

It is an amenable number.

421317006665220 is an abundant number, since it is smaller than the sum of its proper divisors (862258677521940).

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

421317006665220 is a wasteful number, since it uses less digits than its factorization.

421317006665220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221179445 (or 10221179440 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 421317006665220 in words is "four hundred twenty-one trillion, three hundred seventeen billion, six million, six hundred sixty-five thousand, two hundred twenty".