420401021242 has 16 divisors (see below), whose sum is σ = 641719493280. Its totient is φ = 206499299152.

The previous prime is 420401021237. The next prime is 420401021267. The reversal of 420401021242 is 242120104024.

It is a super-2 number, since 2×420401021242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016968 + ... + 1369315.

It is an arithmetic number, because the mean of its divisors is an integer number (40107468330).

Almost surely, 2^420401021242 is an apocalyptic number.

420401021242 is a deficient number, since it is larger than the sum of its proper divisors (221318472038).

420401021242 is a wasteful number, since it uses less digits than its factorization.

420401021242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387837.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 420401021242 its reverse (242120104024), we get a palindrome (662521125266).

The spelling of 420401021242 in words is "four hundred twenty billion, four hundred one million, twenty-one thousand, two hundred forty-two".