21342143100 has 36 divisors (see below), whose sum is σ = 61749934904. Its totient is φ = 5691238080.

The previous prime is 21342143089. The next prime is 21342143107. The reversal of 21342143100 is 134124312.

It is a super-2 number, since 2×21342143100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21342143107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35569939 + ... + 35570538.

Almost surely, 2^21342143100 is an apocalyptic number.

21342143100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21342143100 is an abundant number, since it is smaller than the sum of its proper divisors (40407791804).

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

21342143100 is a wasteful number, since it uses less digits than its factorization.

21342143100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71140494 (or 71140487 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21342143100 its reverse (134124312), we get a palindrome (21476267412).

The spelling of 21342143100 in words is "twenty-one billion, three hundred forty-two million, one hundred forty-three thousand, one hundred".