421131100 has 54 divisors (see below), whose sum is σ = 989598120. Its totient is φ = 155488320.

The previous prime is 421131091. The next prime is 421131101. The reversal of 421131100 is 1131124.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421131101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4441 + ... + 29359.

Almost surely, 2^421131100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421131100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494799060).

421131100 is an abundant number, since it is smaller than the sum of its proper divisors (568467020).

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

421131100 is a wasteful number, since it uses less digits than its factorization.

421131100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24959 (or 24939 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 421131100 is about 20521.4789915347. The cubic root of 421131100 is about 749.5589110086.

Adding to 421131100 its product of nonzero digits (24), we get a palindrome (421131124).

Adding to 421131100 its reverse (1131124), we get a palindrome (422262224).

The spelling of 421131100 in words is "four hundred twenty-one million, one hundred thirty-one thousand, one hundred".