21122150250 has 128 divisors (see below), whose sum is σ = 53244801792. Its totient is φ = 5576966400.

The previous prime is 21122150233. The next prime is 21122150251. The reversal of 21122150250 is 5205122112.

It is a super-2 number, since 2×21122150250² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122150251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60870577 + ... + 60870923.

It is an arithmetic number, because the mean of its divisors is an integer number (415975014).

Almost surely, 2^21122150250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122150250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26622400896).

21122150250 is an abundant number, since it is smaller than the sum of its proper divisors (32122651542).

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

21122150250 is a wasteful number, since it uses less digits than its factorization.

21122150250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 21122150250 its reverse (5205122112), we get a palindrome (26327272362).

The spelling of 21122150250 in words is "twenty-one billion, one hundred twenty-two million, one hundred fifty thousand, two hundred fifty".