400111103421 has 24 divisors (see below), whose sum is σ = 582148569600. Its totient is φ = 264803212800.

The previous prime is 400111103401. The next prime is 400111103453. The reversal of 400111103421 is 124301111004.

It is not a de Polignac number, because 400111103421 - 2⁵ = 400111103389 is a prime.

It is a super-3 number, since 3×400111103421³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400111103394 and 400111103403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400111103401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 607005 + ... + 1081053.

It is an arithmetic number, because the mean of its divisors is an integer number (24256190400).

Almost surely, 2^400111103421 is an apocalyptic number.

It is an amenable number.

400111103421 is a deficient number, since it is larger than the sum of its proper divisors (182037466179).

400111103421 is a wasteful number, since it uses less digits than its factorization.

400111103421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474737 (or 474734 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 400111103421 its reverse (124301111004), we get a palindrome (524412214425).

The spelling of 400111103421 in words is "four hundred billion, one hundred eleven million, one hundred three thousand, four hundred twenty-one".