20211099999967 has 2 divisors, whose sum is σ = 20211099999968. Its totient is φ = 20211099999966.

The previous prime is 20211099999917. The next prime is 20211100000031. The reversal of 20211099999967 is 76999999011202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211099999967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20211099999967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211099999917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105549999983 + 10105549999984.

It is an arithmetic number, because the mean of its divisors is an integer number (10105549999984).

Almost surely, 2^{20211099999967} is an apocalyptic number.

20211099999967 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211099999967 is an equidigital number, since it uses as much as digits as its factorization.

20211099999967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89282088, while the sum is 73.

The spelling of 20211099999967 in words is "twenty trillion, two hundred eleven billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-seven".