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21201121010 = 252392178787
BaseRepresentation
bin10011101111101011…
…110110111011110010
32000201112122112112002
4103233223312323302
5321404441333020
613423433334002
71350245361266
oct235753667362
960645575462
1021201121010
118a9a531013
124138267302
131ccb4a2424
141051a280a6
15841428975
hex4efaf6ef2

21201121010 has 16 divisors (see below), whose sum is σ = 39821236416. Its totient is φ = 8111733168.

The previous prime is 21201120991. The next prime is 21201121093. The reversal of 21201121010 is 1012110212.

It is a junction number, because it is equal to n+sod(n) for n = 21201120982 and 21201121000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46089164 + ... + 46089623.

It is an arithmetic number, because the mean of its divisors is an integer number (2488827276).

Almost surely, 221201121010 is an apocalyptic number.

21201121010 is a deficient number, since it is larger than the sum of its proper divisors (18620115406).

21201121010 is a wasteful number, since it uses less digits than its factorization.

21201121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92178817.

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

Adding to 21201121010 its reverse (1012110212), we get a palindrome (22213231222).

The spelling of 21201121010 in words is "twenty-one billion, two hundred one million, one hundred twenty-one thousand, ten".

Divisors: 1 2 5 10 23 46 115 230 92178787 184357574 460893935 921787870 2120112101 4240224202 10600560505 21201121010