421222131200 has 240 divisors, whose sum is σ = 1125458851440. Its totient is φ = 155310981120.

The previous prime is 421222131149. The next prime is 421222131257. The reversal of 421222131200 is 2131222124.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165899531 + ... + 165902069.

It is an arithmetic number, because the mean of its divisors is an integer number (4689411881).

Almost surely, 2^421222131200 is an apocalyptic number.

421222131200 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421222131200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562729425720).

421222131200 is an abundant number, since it is smaller than the sum of its proper divisors (704236720240).

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

421222131200 is a wasteful number, since it uses less digits than its factorization.

421222131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3577 (or 3556 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 421222131200 its reverse (2131222124), we get a palindrome (423353353324).

The spelling of 421222131200 in words is "four hundred twenty-one billion, two hundred twenty-two million, one hundred thirty-one thousand, two hundred".