421220144432 has 10 divisors (see below), whose sum is σ = 816114029868. Its totient is φ = 210610072208.

The previous prime is 421220144407. The next prime is 421220144437. The reversal of 421220144432 is 234441022124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421220144395 and 421220144404.

It is not an unprimeable number, because it can be changed into a prime (421220144437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13163129498 + ... + 13163129529.

Almost surely, 2^421220144432 is an apocalyptic number.

It is an amenable number.

421220144432 is a deficient number, since it is larger than the sum of its proper divisors (394893885436).

421220144432 is a wasteful number, since it uses less digits than its factorization.

421220144432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26326259035 (or 26326259029 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 421220144432 its reverse (234441022124), we get a palindrome (655661166556).

The spelling of 421220144432 in words is "four hundred twenty-one billion, two hundred twenty million, one hundred forty-four thousand, four hundred thirty-two".