1212212010009 has 256 divisors, whose sum is σ = 2273774469120. Its totient is φ = 554273280000.

The previous prime is 1212212009999. The next prime is 1212212010041. The reversal of 1212212010009 is 9000102122121.

It is a de Polignac number, because none of the positive numbers 2^k-1212212010009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212212010049) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1223220504 + ... + 1223221494.

It is an arithmetic number, because the mean of its divisors is an integer number (8881931520).

Almost surely, 2^{1212212010009} is an apocalyptic number.

It is an amenable number.

1212212010009 is a deficient number, since it is larger than the sum of its proper divisors (1061562459111).

1212212010009 is a wasteful number, since it uses less digits than its factorization.

1212212010009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 1212212010009 in words is "one trillion, two hundred twelve billion, two hundred twelve million, ten thousand, nine".