21214025126250 has 160 divisors (see below), whose sum is σ = 57916906407360. Its totient is φ = 5135770560000.

The previous prime is 21214025126207. The next prime is 21214025126299. The reversal of 21214025126250 is 5262152041212.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 29885446 + ... + 30587054.

It is an arithmetic number, because the mean of its divisors is an integer number (361980665046).

Almost surely, 2^{21214025126250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214025126250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28958453203680).

21214025126250 is an abundant number, since it is smaller than the sum of its proper divisors (36702881281110).

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

21214025126250 is a wasteful number, since it uses less digits than its factorization.

21214025126250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702378 (or 702363 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 21214025126250 its reverse (5262152041212), we get a palindrome (26476177167462).

The spelling of 21214025126250 in words is "twenty-one trillion, two hundred fourteen billion, twenty-five million, one hundred twenty-six thousand, two hundred fifty".