21192204605250 has 512 divisors, whose sum is σ = 64870008053760. Its totient is φ = 4500302976000.

The previous prime is 21192204605233. The next prime is 21192204605251. The reversal of 21192204605250 is 5250640229112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21192204605199 and 21192204605208.

It is not an unprimeable number, because it can be changed into a prime (21192204605251) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2111403232 + ... + 2111413268.

It is an arithmetic number, because the mean of its divisors is an integer number (126699234480).

Almost surely, 2^{21192204605250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21192204605250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32435004026880).

21192204605250 is an abundant number, since it is smaller than the sum of its proper divisors (43677803448510).

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

21192204605250 is a wasteful number, since it uses less digits than its factorization.

21192204605250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10491 (or 10481 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 21192204605250 in words is "twenty-one trillion, one hundred ninety-two billion, two hundred four million, six hundred five thousand, two hundred fifty".