421521611241 has 16 divisors (see below), whose sum is σ = 563585215040. Its totient is φ = 280237164480.

The previous prime is 421521611233. The next prime is 421521611279. The reversal of 421521611241 is 142116125124.

It is not a de Polignac number, because 421521611241 - 2³ = 421521611233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421521611199 and 421521611208.

It is not an unprimeable number, because it can be changed into a prime (421521611201) 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, 1655130 + ... + 1892748.

It is an arithmetic number, because the mean of its divisors is an integer number (35224075940).

Almost surely, 2^421521611241 is an apocalyptic number.

It is an amenable number.

421521611241 is a deficient number, since it is larger than the sum of its proper divisors (142063603799).

421521611241 is a wasteful number, since it uses less digits than its factorization.

421521611241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239256.

The product of its digits is 3840, while the sum is 30.

Adding to 421521611241 its reverse (142116125124), we get a palindrome (563637736365).

The spelling of 421521611241 in words is "four hundred twenty-one billion, five hundred twenty-one million, six hundred eleven thousand, two hundred forty-one".