921950537107321 has 2 divisors, whose sum is σ = 921950537107322. Its totient is φ = 921950537107320.

The previous prime is 921950537107279. The next prime is 921950537107331. The reversal of 921950537107321 is 123701735059129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 657719367681600 + 264231169425721 = 25646040^2 + 16255189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-921950537107321 is a prime.

It is not a weakly prime, because it can be changed into another prime (921950537107331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460975268553660 + 460975268553661.

It is an arithmetic number, because the mean of its divisors is an integer number (460975268553661).

Almost surely, 2^{921950537107321} is an apocalyptic number.

It is an amenable number.

921950537107321 is a deficient number, since it is larger than the sum of its proper divisors (1).

921950537107321 is an equidigital number, since it uses as much as digits as its factorization.

921950537107321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3572100, while the sum is 55.

The spelling of 921950537107321 in words is "nine hundred twenty-one trillion, nine hundred fifty billion, five hundred thirty-seven million, one hundred seven thousand, three hundred twenty-one".