21100150 has 24 divisors (see below), whose sum is σ = 40515264. Its totient is φ = 8167200.

The previous prime is 21100141. The next prime is 21100159. The reversal of 21100150 is 5100112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21100141) and next prime (21100159).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100159) 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, 5257 + ... + 8356.

It is an arithmetic number, because the mean of its divisors is an integer number (1688136).

Almost surely, 2^21100150 is an apocalyptic number.

21100150 is a deficient number, since it is larger than the sum of its proper divisors (19415114).

21100150 is a wasteful number, since it uses less digits than its factorization.

21100150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13656 (or 13651 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 21100150 is about 4593.4899586262. The cubic root of 21100150 is about 276.3303036335.

Adding to 21100150 its reverse (5100112), we get a palindrome (26200262).

The spelling of 21100150 in words is "twenty-one million, one hundred thousand, one hundred fifty".