21001119967 has 2 divisors, whose sum is σ = 21001119968. Its totient is φ = 21001119966.

The previous prime is 21001119959. The next prime is 21001120003. The reversal of 21001119967 is 76991110012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21001119967 - 2³ = 21001119959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001119907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500559983 + 10500559984.

It is an arithmetic number, because the mean of its divisors is an integer number (10500559984).

Almost surely, 2^21001119967 is an apocalyptic number.

21001119967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001119967 is an equidigital number, since it uses as much as digits as its factorization.

21001119967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 37.

Adding to 21001119967 its reverse (76991110012), we get a palindrome (97992229979).

The spelling of 21001119967 in words is "twenty-one billion, one million, one hundred nineteen thousand, nine hundred sixty-seven".