400213433141221 has 32 divisors (see below), whose sum is σ = 473057302118400. Its totient is φ = 331330714669440.

The previous prime is 400213433141209. The next prime is 400213433141251. The reversal of 400213433141221 is 122141334312004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400213433141221 - 2³⁹ = 399663677327333 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400213433141251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249010890 + ... + 250612948.

It is an arithmetic number, because the mean of its divisors is an integer number (14783040691200).

Almost surely, 2^{400213433141221} is an apocalyptic number.

It is an amenable number.

400213433141221 is a deficient number, since it is larger than the sum of its proper divisors (72843868977179).

400213433141221 is a wasteful number, since it uses less digits than its factorization.

400213433141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604329.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 400213433141221 its reverse (122141334312004), we get a palindrome (522354767453225).

The spelling of 400213433141221 in words is "four hundred trillion, two hundred thirteen billion, four hundred thirty-three million, one hundred forty-one thousand, two hundred twenty-one".