421540221410 has 64 divisors (see below), whose sum is σ = 947227094784. Its totient is φ = 131219001600.

The previous prime is 421540221373. The next prime is 421540221433. The reversal of 421540221410 is 14122045124.

It is a self number, because there is not a number n which added to its sum of digits gives 421540221410.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241100 + ... + 949320.

It is an arithmetic number, because the mean of its divisors is an integer number (14800423356).

Almost surely, 2^421540221410 is an apocalyptic number.

421540221410 is an abundant number, since it is smaller than the sum of its proper divisors (525686873374).

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

421540221410 is a wasteful number, since it uses less digits than its factorization.

421540221410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709019.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 421540221410 its reverse (14122045124), we get a palindrome (435662266534).

The spelling of 421540221410 in words is "four hundred twenty-one billion, five hundred forty million, two hundred twenty-one thousand, four hundred ten".