21150102 has 8 divisors (see below), whose sum is σ = 42300216. Its totient is φ = 7050032.

The previous prime is 21150083. The next prime is 21150113. The reversal of 21150102 is 20105112.

It is a sphenic number, since it is the product of 3 distinct primes.

21150102 is an admirable number.

It is a super-2 number, since 2×21150102² = 894653629220808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762503 + ... + 1762514.

It is an arithmetic number, because the mean of its divisors is an integer number (5287527).

Almost surely, 2^21150102 is an apocalyptic number.

21150102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21150102 is a wasteful number, since it uses less digits than its factorization.

21150102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525022.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 21150102 is about 4598.9240045906. The cubic root of 21150102 is about 276.5481910756.

Adding to 21150102 its reverse (20105112), we get a palindrome (41255214).

The spelling of 21150102 in words is "twenty-one million, one hundred fifty thousand, one hundred two".