921200916667 has 2 divisors, whose sum is σ = 921200916668. Its totient is φ = 921200916666.

The previous prime is 921200916593. The next prime is 921200916677. The reversal of 921200916667 is 766619002129.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 921200916667 - 2⁷ = 921200916539 is a prime.

It is a super-2 number, since 2×921200916667² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 921200916667.

It is not a weakly prime, because it can be changed into another prime (921200916677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460600458333 + 460600458334.

It is an arithmetic number, because the mean of its divisors is an integer number (460600458334).

Almost surely, 2^921200916667 is an apocalyptic number.

921200916667 is a deficient number, since it is larger than the sum of its proper divisors (1).

921200916667 is an equidigital number, since it uses as much as digits as its factorization.

921200916667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 921200916667 in words is "nine hundred twenty-one billion, two hundred million, nine hundred sixteen thousand, six hundred sixty-seven".