400124324221 has 8 divisors (see below), whose sum is σ = 421591248320. Its totient is φ = 378698175072.

The previous prime is 400124324209. The next prime is 400124324233. The reversal of 400124324221 is 122423421004.

It is an interprime number because it is at equal distance from previous prime (400124324209) and next prime (400124324233).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400124324221 - 2⁵ = 400124324189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400124324291) 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, 10173585 + ... + 10212838.

It is an arithmetic number, because the mean of its divisors is an integer number (52698906040).

Almost surely, 2^400124324221 is an apocalyptic number.

It is an amenable number.

400124324221 is a deficient number, since it is larger than the sum of its proper divisors (21466924099).

400124324221 is a wasteful number, since it uses less digits than its factorization.

400124324221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20387475.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 400124324221 its reverse (122423421004), we get a palindrome (522547745225).

The spelling of 400124324221 in words is "four hundred billion, one hundred twenty-four million, three hundred twenty-four thousand, two hundred twenty-one".