21002119967 has 2 divisors, whose sum is σ = 21002119968. Its totient is φ = 21002119966.

The previous prime is 21002119951. The next prime is 21002119979. The reversal of 21002119967 is 76991120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002119967 - 2⁴ = 21002119951 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21002119967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002119987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501059983 + 10501059984.

It is an arithmetic number, because the mean of its divisors is an integer number (10501059984).

Almost surely, 2^21002119967 is an apocalyptic number.

21002119967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002119967 is an equidigital number, since it uses as much as digits as its factorization.

21002119967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

Adding to 21002119967 its reverse (76991120012), we get a palindrome (97993239979).

The spelling of 21002119967 in words is "twenty-one billion, two million, one hundred nineteen thousand, nine hundred sixty-seven".