42012013221 has 12 divisors (see below), whose sum is σ = 61147257600. Its totient is φ = 27794206440.

The previous prime is 42012013213. The next prime is 42012013243. The reversal of 42012013221 is 12231021024.

It is a happy number.

42012013221 is a `hidden beast` number, since 420 + 1 + 20 + 1 + 3 + 221 = 666.

It is not a de Polignac number, because 42012013221 - 2³ = 42012013213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42012013194 and 42012013203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012013261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17815621 + ... + 17817978.

It is an arithmetic number, because the mean of its divisors is an integer number (5095604800).

Almost surely, 2^42012013221 is an apocalyptic number.

It is an amenable number.

42012013221 is a deficient number, since it is larger than the sum of its proper divisors (19135244379).

42012013221 is a wasteful number, since it uses less digits than its factorization.

42012013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35633736 (or 35633733 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42012013221 its reverse (12231021024), we get a palindrome (54243034245).

The spelling of 42012013221 in words is "forty-two billion, twelve million, thirteen thousand, two hundred twenty-one".