1021212209999 has 2 divisors, whose sum is σ = 1021212210000. Its totient is φ = 1021212209998.

The previous prime is 1021212209977. The next prime is 1021212210047. The reversal of 1021212209999 is 9999022121201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021212209999 is a prime.

It is a super-3 number, since 3×1021212209999³ (a number of 37 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021212209099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510606104999 + 510606105000.

It is an arithmetic number, because the mean of its divisors is an integer number (510606105000).

Almost surely, 2^{1021212209999} is an apocalyptic number.

1021212209999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021212209999 is an equidigital number, since it uses as much as digits as its factorization.

1021212209999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The spelling of 1021212209999 in words is "one trillion, twenty-one billion, two hundred twelve million, two hundred nine thousand, nine hundred ninety-nine".