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20211100000000 = 28587132221
BaseRepresentation
bin1001001100001110000110…
…11011111001111100000000
32122120011101022100121121021
410212013003123321330000
510122114313100000000
6110552503503435224
74154126620303630
oct446070333717400
978504338317537
1020211100000000
116492530058558
1223250685b5b14
13b37b8b171040
144dc3186006c0
15250b0ca4e11a
hex1261c36f9f00

20211100000000 has 648 divisors, whose sum is σ = 62094452582624. Its totient is φ = 6393600000000.

The previous prime is 20211099999967. The next prime is 20211100000031. The reversal of 20211100000000 is 111202.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9099998890 + ... + 9100001110.

Almost surely, 220211100000000 is an apocalyptic number.

20211100000000 is a gapful number since it is divisible by the number (20) 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 20211100000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31047226291312).

20211100000000 is an abundant number, since it is smaller than the sum of its proper divisors (41883352582624).

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

20211100000000 is an frugal number, since it uses more digits than its factorization.

20211100000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20211100000000 its reverse (111202), we get a palindrome (20211100111202).

The spelling of 20211100000000 in words is "twenty trillion, two hundred eleven billion, one hundred million", and thus it is an aban number.