421305101132520 has 128 divisors (see below), whose sum is σ = 1397704594861440. Its totient is φ = 100735466250240.

The previous prime is 421305101132519. The next prime is 421305101132527. The reversal of 421305101132520 is 25231101503124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (421305101132527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2186003169 + ... + 2186195888.

It is an arithmetic number, because the mean of its divisors is an integer number (10919567147355).

Almost surely, 2^{421305101132520} is an apocalyptic number.

421305101132520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421305101132520 is an abundant number, since it is smaller than the sum of its proper divisors (976399493728920).

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

421305101132520 is a wasteful number, since it uses less digits than its factorization.

421305101132520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372199155 (or 4372199151 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 421305101132520 its reverse (25231101503124), we get a palindrome (446536202635644).

The spelling of 421305101132520 in words is "four hundred twenty-one trillion, three hundred five billion, one hundred one million, one hundred thirty-two thousand, five hundred twenty".