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21210111101101 = 1313585112009827
BaseRepresentation
bin1001101001010010111010…
…01000110100100010101101
32210002200000002222202211011
410310221131020310202231
510240001301420213401
6113035442430425221
74316244216455536
oct464513510644255
983080002882734
1021210111101101
11683818085202a
1224667b3362211
13bab1495b84b0
1453480958968d
1526bacc578451
hex134a5d2348ad

21210111101101 has 8 divisors (see below), whose sum is σ = 22841828148384. Its totient is φ = 19578418345200.

The previous prime is 21210111101089. The next prime is 21210111101131. The reversal of 21210111101101 is 10110111101212.

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

It is not a de Polignac number, because 21210111101101 - 211 = 21210111099053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210111101131) 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, 4238851 + ... + 7770976.

It is an arithmetic number, because the mean of its divisors is an integer number (2855228518548).

Almost surely, 221210111101101 is an apocalyptic number.

It is an amenable number.

21210111101101 is a deficient number, since it is larger than the sum of its proper divisors (1631717047283).

21210111101101 is a wasteful number, since it uses less digits than its factorization.

21210111101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12145691.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 21210111101101 its reverse (10110111101212), we get a palindrome (31320222202313).

The spelling of 21210111101101 in words is "twenty-one trillion, two hundred ten billion, one hundred eleven million, one hundred one thousand, one hundred one".

Divisors: 1 13 135851 1766063 12009827 156127751 1631547007777 21210111101101