421220144400 has 120 divisors (see below), whose sum is σ = 1471972987104. Its totient is φ = 102113971200.

The previous prime is 421220144393. The next prime is 421220144407. The reversal of 421220144400 is 4441022124.

It is an interprime number because it is at equal distance from previous prime (421220144393) and next prime (421220144407).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 23 ways as a sum of consecutive naturals, for example, 15942109 + ... + 15968508.

Almost surely, 2^421220144400 is an apocalyptic number.

421220144400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421220144400 is an abundant number, since it is smaller than the sum of its proper divisors (1050752842704).

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

421220144400 is a wasteful number, since it uses less digits than its factorization.

421220144400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31910649 (or 31910638 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 421220144400 its reverse (4441022124), we get a palindrome (425661166524).

The spelling of 421220144400 in words is "four hundred twenty-one billion, two hundred twenty million, one hundred forty-four thousand, four hundred".