21122225750 has 16 divisors (see below), whose sum is σ = 39540807072. Its totient is φ = 8448890200.

The previous prime is 21122225669. The next prime is 21122225771. The reversal of 21122225750 is 5752222112.

It is a super-2 number, since 2×21122225750² (a number of 21 digits) 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 7 ways as a sum of consecutive naturals, for example, 42244202 + ... + 42244701.

It is an arithmetic number, because the mean of its divisors is an integer number (2471300442).

Almost surely, 2^21122225750 is an apocalyptic number.

21122225750 is a deficient number, since it is larger than the sum of its proper divisors (18418581322).

21122225750 is an equidigital number, since it uses as much as digits as its factorization.

21122225750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84488920 (or 84488910 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

Adding to 21122225750 its reverse (5752222112), we get a palindrome (26874447862).

The spelling of 21122225750 in words is "twenty-one billion, one hundred twenty-two million, two hundred twenty-five thousand, seven hundred fifty".