400020201302242 has 4 divisors (see below), whose sum is σ = 600030301953366. Its totient is φ = 200010100651120.

The previous prime is 400020201302213. The next prime is 400020201302263. The reversal of 400020201302242 is 242203102020004.

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., 212693376848121 + 187326824454121 = 14584011^2 + 13686739^2 .

It is a super-2 number, since 2×400020201302242² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005050325559 + ... + 100005050325562.

Almost surely, 2^{400020201302242} is an apocalyptic number.

400020201302242 is a deficient number, since it is larger than the sum of its proper divisors (200010100651124).

400020201302242 is a wasteful number, since it uses less digits than its factorization.

400020201302242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200010100651123.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 400020201302242 its reverse (242203102020004), we get a palindrome (642223303322246).

The spelling of 400020201302242 in words is "four hundred trillion, twenty billion, two hundred one million, three hundred two thousand, two hundred forty-two".