21401210431100 has 36 divisors (see below), whose sum is σ = 46604727851304. Its totient is φ = 8530235100480.

The previous prime is 21401210431093. The next prime is 21401210431103. The reversal of 21401210431100 is 113401210412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401210431103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378084959 + ... + 378141558.

Almost surely, 2^{21401210431100} is an apocalyptic number.

21401210431100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401210431100 is an abundant number, since it is smaller than the sum of its proper divisors (25203517420204).

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

21401210431100 is a wasteful number, since it uses less digits than its factorization.

21401210431100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756226814 (or 756226807 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21401210431100 its reverse (113401210412), we get a palindrome (21514611641512).

The spelling of 21401210431100 in words is "twenty-one trillion, four hundred one billion, two hundred ten million, four hundred thirty-one thousand, one hundred".