21122050 has 24 divisors (see below), whose sum is σ = 40997376. Its totient is φ = 8081040.

The previous prime is 21122033. The next prime is 21122069. The reversal of 21122050 is 5022112.

It is a super-2 number, since 2×21122050² = 892281992405000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122050.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8034 + ... + 10333.

It is an arithmetic number, because the mean of its divisors is an integer number (1708224).

Almost surely, 2^21122050 is an apocalyptic number.

21122050 is a deficient number, since it is larger than the sum of its proper divisors (19875326).

21122050 is a wasteful number, since it uses less digits than its factorization.

21122050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18402 (or 18397 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 21122050 is about 4595.8731488151. The cubic root of 21122050 is about 276.4258723250.

Adding to 21122050 its reverse (5022112), we get a palindrome (26144162).

The spelling of 21122050 in words is "twenty-one million, one hundred twenty-two thousand, fifty".