400000014244121 has 4 divisors (see below), whose sum is σ = 400000675032612. Its totient is φ = 399999353455632.

The previous prime is 400000014244097. The next prime is 400000014244223. The reversal of 400000014244121 is 121442410000004.

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

It can be written as a sum of positive squares in 2 ways, for example, as 379102901419225 + 20897112824896 = 19470565^2 + 4571336^2 .

It is a cyclic number.

It is not a de Polignac number, because 400000014244121 - 2¹⁰ = 400000014243097 is a prime.

It is a super-2 number, since 2×400000014244121² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400000014244921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329485406 + ... + 330697191.

It is an arithmetic number, because the mean of its divisors is an integer number (100000168758153).

Almost surely, 2^{400000014244121} is an apocalyptic number.

It is an amenable number.

400000014244121 is a deficient number, since it is larger than the sum of its proper divisors (660788491).

400000014244121 is an equidigital number, since it uses as much as digits as its factorization.

400000014244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660788490.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 400000014244121 its reverse (121442410000004), we get a palindrome (521442424244125).

The spelling of 400000014244121 in words is "four hundred trillion, fourteen million, two hundred forty-four thousand, one hundred twenty-one".