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10111111220 = 225797744559
BaseRepresentation
bin10010110101010101…
…10101000000110100
3222002122211200001202
421122222311000310
5131201421024340
64351152112032
7505364012240
oct113252650064
928078750052
1010111111220
114319505571
121b62235618
13c51a21562
146bcc07420
153e2a09c15
hex25aab5034

10111111220 has 48 divisors (see below), whose sum is σ = 24516871680. Its totient is φ = 3430923264.

The previous prime is 10111111189. The next prime is 10111111237. The reversal of 10111111220 is 2211111101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358700 + ... + 385859.

It is an arithmetic number, because the mean of its divisors is an integer number (510768160).

Almost surely, 210111111220 is an apocalyptic number.

10111111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10111111220 is an abundant number, since it is smaller than the sum of its proper divisors (14405760460).

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

10111111220 is a wasteful number, since it uses less digits than its factorization.

10111111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744672 (or 744670 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10111111220 its reverse (2211111101), we get a palindrome (12322222321).

The spelling of 10111111220 in words is "ten billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 97 140 194 388 485 679 970 1358 1940 2716 3395 6790 13580 744559 1489118 2978236 3722795 5211913 7445590 10423826 14891180 20847652 26059565 52119130 72222223 104238260 144444446 288888892 361111115 505555561 722222230 1011111122 1444444460 2022222244 2527777805 5055555610 10111111220