10001212209999 has 24 divisors (see below), whose sum is σ = 15039532544400. Its totient is φ = 6641531283456.

The previous prime is 10001212209977. The next prime is 10001212210001. The reversal of 10001212209999 is 99990221210001.

It is not a de Polignac number, because 10001212209999 - 2¹² = 10001212205903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001212209929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80010024 + ... + 80134925.

It is an arithmetic number, because the mean of its divisors is an integer number (626647189350).

Almost surely, 2^{10001212209999} is an apocalyptic number.

10001212209999 is a deficient number, since it is larger than the sum of its proper divisors (5038320334401).

10001212209999 is an equidigital number, since it uses as much as digits as its factorization.

10001212209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160145221 (or 160145209 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 10001212209999 in words is "ten trillion, one billion, two hundred twelve million, two hundred nine thousand, nine hundred ninety-nine".