21010199967 has 6 divisors (see below), whose sum is σ = 30348066632. Its totient is φ = 14006799972.

The previous prime is 21010199929. The next prime is 21010199983. The reversal of 21010199967 is 76999101012.

It is not a de Polignac number, because 21010199967 - 2⁷ = 21010199839 is a prime.

It is a super-3 number, since 3×21010199967³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010199167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1167233323 + ... + 1167233340.

Almost surely, 2^21010199967 is an apocalyptic number.

21010199967 is a deficient number, since it is larger than the sum of its proper divisors (9337866665).

21010199967 is a wasteful number, since it uses less digits than its factorization.

21010199967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334466669 (or 2334466666 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 45.

The spelling of 21010199967 in words is "twenty-one billion, ten million, one hundred ninety-nine thousand, nine hundred sixty-seven".