403121400442 has 4 divisors (see below), whose sum is σ = 604682100666. Its totient is φ = 201560700220.

The previous prime is 403121400389. The next prime is 403121400449. The reversal of 403121400442 is 244004121304.

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., 229298280201 + 173823120241 = 478851^2 + 416921^2 .

It is not an unprimeable number, because it can be changed into a prime (403121400449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100780350109 + ... + 100780350112.

Almost surely, 2^403121400442 is an apocalyptic number.

403121400442 is a deficient number, since it is larger than the sum of its proper divisors (201560700224).

403121400442 is a wasteful number, since it uses less digits than its factorization.

403121400442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201560700223.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 403121400442 its reverse (244004121304), we get a palindrome (647125521746).

The spelling of 403121400442 in words is "four hundred three billion, one hundred twenty-one million, four hundred thousand, four hundred forty-two".