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BaseRepresentation
bin10001101000111101011…
…010110100111011110100
311021212221002021100222201
4101220331122310323310
5124330102033021322
62324514313234244
7153402503235106
oct21507532647364
94255832240881
101212211220212
114281066a4623
12176b27102984
138a4074348b5
1442958209576
15217ebc7ed27
hex11a3d6b4ef4

1212211220212 has 6 divisors (see below), whose sum is σ = 2121369635378. Its totient is φ = 606105610104.

The previous prime is 1212211220197. The next prime is 1212211220251. The reversal of 1212211220212 is 2120221122121.

It can be written as a sum of positive squares in only one way, i.e., 1189661392656 + 22549827556 = 1090716^2 + 150166^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212211220212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151526402523 + ... + 151526402530.

Almost surely, 21212211220212 is an apocalyptic number.

It is an amenable number.

1212211220212 is a deficient number, since it is larger than the sum of its proper divisors (909158415166).

1212211220212 is a wasteful number, since it uses less digits than its factorization.

1212211220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303052805057 (or 303052805055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212211220212 its reverse (2120221122121), we get a palindrome (3332432342333).

The spelling of 1212211220212 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred twelve".