421220144401 has 32 divisors (see below), whose sum is σ = 511053933312. Its totient is φ = 338914160640.

The previous prime is 421220144393. The next prime is 421220144407. The reversal of 421220144401 is 104441022124.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 421220144401 - 2³ = 421220144393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421220144407) 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, 155602690 + ... + 155605396.

It is an arithmetic number, because the mean of its divisors is an integer number (15970435416).

Almost surely, 2^421220144401 is an apocalyptic number.

It is an amenable number.

421220144401 is a deficient number, since it is larger than the sum of its proper divisors (89833788911).

421220144401 is a wasteful number, since it uses less digits than its factorization.

421220144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 421220144401 its reverse (104441022124), we get a palindrome (525661166525).

The spelling of 421220144401 in words is "four hundred twenty-one billion, two hundred twenty million, one hundred forty-four thousand, four hundred one".