21100250069712 has 240 divisors, whose sum is σ = 67268431152000. Its totient is φ = 6111658967040.

The previous prime is 21100250069659. The next prime is 21100250069713. The reversal of 21100250069712 is 21796005200112.

21100250069712 is a `hidden beast` number, since 21 + 1 + 0 + 0 + 2 + 500 + 69 + 71 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100250069713) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51127164 + ... + 51538212.

It is an arithmetic number, because the mean of its divisors is an integer number (280285129800).

Almost surely, 2^{21100250069712} is an apocalyptic number.

21100250069712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100250069712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33634215576000).

21100250069712 is an abundant number, since it is smaller than the sum of its proper divisors (46168181082288).

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

21100250069712 is a wasteful number, since it uses less digits than its factorization.

21100250069712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412506 (or 412497 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

Adding to 21100250069712 its reverse (21796005200112), we get a palindrome (42896255269824).

The spelling of 21100250069712 in words is "twenty-one trillion, one hundred billion, two hundred fifty million, sixty-nine thousand, seven hundred twelve".