21114215100 has 108 divisors (see below), whose sum is σ = 72197853000. Its totient is φ = 5118595200.

The previous prime is 21114215077. The next prime is 21114215123. The reversal of 21114215100 is 151241112.

21114215100 is a `hidden beast` number, since 2 + 11 + 142 + 1 + 510 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21114215077) and next prime (21114215123).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 1056475 + ... + 1076274.

Almost surely, 2^21114215100 is an apocalyptic number.

21114215100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114215100 is an abundant number, since it is smaller than the sum of its proper divisors (51083637900).

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

21114215100 is a wasteful number, since it uses less digits than its factorization.

21114215100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132780 (or 2132770 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 21114215100 its reverse (151241112), we get a palindrome (21265456212).

The spelling of 21114215100 in words is "twenty-one billion, one hundred fourteen million, two hundred fifteen thousand, one hundred".