21312422050 has 12 divisors (see below), whose sum is σ = 39641105106. Its totient is φ = 8524968800.

The previous prime is 21312422041. The next prime is 21312422099. The reversal of 21312422050 is 5022421312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13489196449 + 7823225601 = 116143^2 + 88449^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213124171 + ... + 213124270.

Almost surely, 2^21312422050 is an apocalyptic number.

21312422050 is a deficient number, since it is larger than the sum of its proper divisors (18328683056).

21312422050 is a wasteful number, since it uses less digits than its factorization.

21312422050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426248453 (or 426248448 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21312422050 its reverse (5022421312), we get a palindrome (26334843362).

The spelling of 21312422050 in words is "twenty-one billion, three hundred twelve million, four hundred twenty-two thousand, fifty".