423421121000 has 64 divisors (see below), whose sum is σ = 994661300880. Its totient is φ = 168709324800.

The previous prime is 423421120999. The next prime is 423421121003. The reversal of 423421121000 is 121124324.

It can be written as a sum of positive squares in 8 ways, for example, as 126916912516 + 296504208484 = 356254^2 + 544522^2 .

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

It is not an unprimeable number, because it can be changed into a prime (423421121003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 566777 + ... + 1080776.

Almost surely, 2^423421121000 is an apocalyptic number.

423421121000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423421121000 is an abundant number, since it is smaller than the sum of its proper divisors (571240179880).

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

423421121000 is a wasteful number, since it uses less digits than its factorization.

423421121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647831 (or 1647817 counting only the distinct ones).

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

Adding to 423421121000 its reverse (121124324), we get a palindrome (423542245324).

The spelling of 423421121000 in words is "four hundred twenty-three billion, four hundred twenty-one million, one hundred twenty-one thousand".