21114210100 has 36 divisors (see below), whose sum is σ = 45862414444. Its totient is φ = 8437466880.

The previous prime is 21114210083. The next prime is 21114210107. The reversal of 21114210100 is 101241112.

It can be written as a sum of positive squares in 6 ways, for example, as 466819236 + 20647390864 = 21606^2 + 143692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114210107) 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, 1102 + ... + 205498.

Almost surely, 2^21114210100 is an apocalyptic number.

21114210100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114210100 is an abundant number, since it is smaller than the sum of its proper divisors (24748204344).

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

21114210100 is a wasteful number, since it uses less digits than its factorization.

21114210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205444 (or 205437 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21114210100 its reverse (101241112), we get a palindrome (21215451212).

The spelling of 21114210100 in words is "twenty-one billion, one hundred fourteen million, two hundred ten thousand, one hundred".