21101050 has 24 divisors (see below), whose sum is σ = 39568896. Its totient is φ = 8371440.

The previous prime is 21101033. The next prime is 21101123. The reversal of 21101050 is 5010112.

It is a happy number.

It is a super-2 number, since 2×21101050² = 890508622205000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4689 + ... + 8011.

It is an arithmetic number, because the mean of its divisors is an integer number (1648704).

Almost surely, 2^21101050 is an apocalyptic number.

21101050 is a deficient number, since it is larger than the sum of its proper divisors (18467846).

21101050 is a wasteful number, since it uses less digits than its factorization.

21101050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462 (or 3457 counting only the distinct ones).

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

The square root of 21101050 is about 4593.5879223108. The cubic root of 21101050 is about 276.3342324166.

Adding to 21101050 its reverse (5010112), we get a palindrome (26111162).

It can be divided in two parts, 2110 and 1050, that added together give a triangular number (3160 = T₇₉).

The spelling of 21101050 in words is "twenty-one million, one hundred one thousand, fifty".