21124150250 has 32 divisors (see below), whose sum is σ = 45193614336. Its totient is φ = 7242565200.

The previous prime is 21124150193. The next prime is 21124150259. The reversal of 21124150250 is 5205142112.

It is not an unprimeable number, because it can be changed into a prime (21124150259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6033722 + ... + 6037221.

It is an arithmetic number, because the mean of its divisors is an integer number (1412300448).

Almost surely, 2^21124150250 is an apocalyptic number.

21124150250 is an abundant number, since it is smaller than the sum of its proper divisors (24069464086).

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

21124150250 is a wasteful number, since it uses less digits than its factorization.

21124150250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12070967 (or 12070957 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 21124150250 its reverse (5205142112), we get a palindrome (26329292362).

The spelling of 21124150250 in words is "twenty-one billion, one hundred twenty-four million, one hundred fifty thousand, two hundred fifty".