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21210011012 = 229839538927
BaseRepresentation
bin10011110000001101…
…110001010110000100
32000202011101012022102
4103300031301112010
5321414230323022
613424352051232
71350414055541
oct236015612604
960664335272
1021210011012
118aa4553223
12413b233b18
132000295998
141052c9dbc8
158420d2a92
hex4f0371584

21210011012 has 12 divisors (see below), whose sum is σ = 37121360640. Its totient is φ = 10603907976.

The previous prime is 21210010937. The next prime is 21210011023. The reversal of 21210011012 is 21011001212.

It is a super-2 number, since 2×212100110122 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21210010984 and 21210011002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230108 + ... + 308819.

It is an arithmetic number, because the mean of its divisors is an integer number (3093446720).

Almost surely, 221210011012 is an apocalyptic number.

It is an amenable number.

21210011012 is a deficient number, since it is larger than the sum of its proper divisors (15911349628).

21210011012 is a wasteful number, since it uses less digits than its factorization.

21210011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548770 (or 548768 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21210011012 its reverse (21011001212), we get a palindrome (42221012224).

The spelling of 21210011012 in words is "twenty-one billion, two hundred ten million, eleven thousand, twelve".

Divisors: 1 2 4 9839 19678 39356 538927 1077854 2155708 5302502753 10605005506 21210011012