420121311242 has 4 divisors (see below), whose sum is σ = 630181966866. Its totient is φ = 210060655620.

The previous prime is 420121311223. The next prime is 420121311293. The reversal of 420121311242 is 242113121024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 231766179241 + 188355132001 = 481421^2 + 433999^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105030327809 + ... + 105030327812.

Almost surely, 2^420121311242 is an apocalyptic number.

420121311242 is a deficient number, since it is larger than the sum of its proper divisors (210060655624).

420121311242 is a wasteful number, since it uses less digits than its factorization.

420121311242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210060655623.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 420121311242 its reverse (242113121024), we get a palindrome (662234432266).

The spelling of 420121311242 in words is "four hundred twenty billion, one hundred twenty-one million, three hundred eleven thousand, two hundred forty-two".