400303211421 has 16 divisors (see below), whose sum is σ = 534870937088. Its totient is φ = 266302436400.

The previous prime is 400303211417. The next prime is 400303211437. The reversal of 400303211421 is 124112303004.

It is not a de Polignac number, because 400303211421 - 2² = 400303211417 is a prime.

It is a super-2 number, since 2×400303211421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400303211411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5825856 + ... + 5894166.

It is an arithmetic number, because the mean of its divisors is an integer number (33429433568).

Almost surely, 2^400303211421 is an apocalyptic number.

It is an amenable number.

400303211421 is a deficient number, since it is larger than the sum of its proper divisors (134567725667).

400303211421 is a wasteful number, since it uses less digits than its factorization.

400303211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72432.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 400303211421 its reverse (124112303004), we get a palindrome (524415514425).

The spelling of 400303211421 in words is "four hundred billion, three hundred three million, two hundred eleven thousand, four hundred twenty-one".