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21120212203 = 197983310903
BaseRepresentation
bin10011101010110111…
…001101110011101011
32000111220101221111121
4103222313031303223
5321223233242303
613411423240111
71345243561456
oct235267156353
960456357447
1021120212203
118a5889a032
124115149037
131cb77b44ac
141044da649d
158392959bd
hex4eadcdceb

21120212203 has 8 divisors (see below), whose sum is σ = 21231527328. Its totient is φ = 21008938944.

The previous prime is 21120212189. The next prime is 21120212237. The reversal of 21120212203 is 30221202112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21120212203 - 25 = 21120212171 is a prime.

It is a super-2 number, since 2×211202122032 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120212273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1931650 + ... + 1942552.

It is an arithmetic number, because the mean of its divisors is an integer number (2653940916).

Almost surely, 221120212203 is an apocalyptic number.

21120212203 is a deficient number, since it is larger than the sum of its proper divisors (111315125).

21120212203 is a wasteful number, since it uses less digits than its factorization.

21120212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20933.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21120212203 its reverse (30221202112), we get a palindrome (51341414315).

The spelling of 21120212203 in words is "twenty-one billion, one hundred twenty million, two hundred twelve thousand, two hundred three".

Divisors: 1 197 9833 10903 1937101 2147891 107209199 21120212203