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1212120200121 = 34871886943969
BaseRepresentation
bin10001101000110111111…
…111100111001110111001
311021212200202000001220020
4101220313333213032321
5124324410232400441
62324501302321053
7153400316463315
oct21506777471671
94255622001806
101212120200121
1142806a286906
12176b00729189
138a3c161655c
144294a0b4b45
15217e3ca0e66
hex11a37fe73b9

1212120200121 has 16 divisors (see below), whose sum is σ = 1619601532800. Its totient is φ = 806359753728.

The previous prime is 1212120200117. The next prime is 1212120200129. The reversal of 1212120200121 is 1210020212121.

It is not a de Polignac number, because 1212120200121 - 22 = 1212120200117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212120200121.

It is not an unprimeable number, because it can be changed into a prime (1212120200129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27545625 + ... + 27589593.

It is an arithmetic number, because the mean of its divisors is an integer number (101225095800).

Almost surely, 21212120200121 is an apocalyptic number.

It is an amenable number.

1212120200121 is a deficient number, since it is larger than the sum of its proper divisors (407481332679).

1212120200121 is a wasteful number, since it uses less digits than its factorization.

1212120200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63328.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212120200121 its reverse (1210020212121), we get a palindrome (2422140412242).

The spelling of 1212120200121 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred thousand, one hundred twenty-one".

Divisors: 1 3 487 1461 18869 43969 56607 131907 9189203 21412903 27567609 64238709 829651061 2488953183 404040066707 1212120200121