400031221112 has 32 divisors (see below), whose sum is σ = 751542105600. Its totient is φ = 199620156000.

The previous prime is 400031221111. The next prime is 400031221133. The reversal of 400031221112 is 211122130004.

It is a super-3 number, since 3×400031221112³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031221111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30411737 + ... + 30424887.

It is an arithmetic number, because the mean of its divisors is an integer number (23485690800).

Almost surely, 2^400031221112 is an apocalyptic number.

It is an amenable number.

400031221112 is a deficient number, since it is larger than the sum of its proper divisors (351510884488).

400031221112 is a wasteful number, since it uses less digits than its factorization.

400031221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20387 (or 20383 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 400031221112 its reverse (211122130004), we get a palindrome (611153351116).

The spelling of 400031221112 in words is "four hundred billion, thirty-one million, two hundred twenty-one thousand, one hundred twelve".