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10033211221 = 11282919101
BaseRepresentation
bin10010101100000011…
…01010011101010101
3221220020020221100121
421112001222131111
5131022000224341
64335330311541
7503426613445
oct112601523525
927806227317
1010033211221
114289539100
121b401285b1
13c3b847c97
146b272a125
153dac6d4d1
hex25606a755

10033211221 has 6 divisors (see below), whose sum is σ = 11028240566. Its totient is φ = 9121101000.

The previous prime is 10033211219. The next prime is 10033211233. The reversal of 10033211221 is 12211233001.

It can be written as a sum of positive squares in only one way, i.e., 5342879025 + 4690332196 = 73095^2 + 68486^2 .

It is not a de Polignac number, because 10033211221 - 21 = 10033211219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10033211195 and 10033211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10033211261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41459430 + ... + 41459671.

Almost surely, 210033211221 is an apocalyptic number.

10033211221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10033211221 is a deficient number, since it is larger than the sum of its proper divisors (995029345).

10033211221 is an equidigital number, since it uses as much as digits as its factorization.

10033211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82919123 (or 82919112 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 10033211221 its reverse (12211233001), we get a palindrome (22244444222).

The spelling of 10033211221 in words is "ten billion, thirty-three million, two hundred eleven thousand, two hundred twenty-one".

Divisors: 1 11 121 82919101 912110111 10033211221