400121441430 has 128 divisors (see below), whose sum is σ = 1013792080896. Its totient is φ = 100867008000.

The previous prime is 400121441413. The next prime is 400121441491. The reversal of 400121441430 is 34144121004.

It is a self number, because there is not a number n which added to its sum of digits gives 400121441430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 40903140 + ... + 40912920.

It is an arithmetic number, because the mean of its divisors is an integer number (7920250632).

Almost surely, 2^400121441430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400121441430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506896040448).

400121441430 is an abundant number, since it is smaller than the sum of its proper divisors (613670639466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400121441430 is a wasteful number, since it uses less digits than its factorization.

400121441430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10502.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 400121441430 its reverse (34144121004), we get a palindrome (434265562434).

The spelling of 400121441430 in words is "four hundred billion, one hundred twenty-one million, four hundred forty-one thousand, four hundred thirty".