421011444431 has 16 divisors (see below), whose sum is σ = 425064643584. Its totient is φ = 416982855744.

The previous prime is 421011444397. The next prime is 421011444517. The reversal of 421011444431 is 134444110124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421011444431 - 2¹⁸ = 421011182287 is a prime.

It is a super-2 number, since 2×421011444431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421011444394 and 421011444403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421011444031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38174540 + ... + 38185566.

It is an arithmetic number, because the mean of its divisors is an integer number (26566540224).

Almost surely, 2^421011444431 is an apocalyptic number.

421011444431 is a deficient number, since it is larger than the sum of its proper divisors (4053199153).

421011444431 is a wasteful number, since it uses less digits than its factorization.

421011444431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12110.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 421011444431 its reverse (134444110124), we get a palindrome (555455554555).

The spelling of 421011444431 in words is "four hundred twenty-one billion, eleven million, four hundred forty-four thousand, four hundred thirty-one".