921520202133101 has 2 divisors, whose sum is σ = 921520202133102. Its totient is φ = 921520202133100.

The previous prime is 921520202133031. The next prime is 921520202133103. The reversal of 921520202133101 is 101331202025129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534982975830601 + 386537226302500 = 23129699^2 + 19660550^2 .

It is an emirp because it is prime and its reverse (101331202025129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 921520202133101 - 2⁴⁶ = 851151457955437 is a prime.

Together with 921520202133103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921520202133103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460760101066550 + 460760101066551.

It is an arithmetic number, because the mean of its divisors is an integer number (460760101066551).

Almost surely, 2^{921520202133101} is an apocalyptic number.

It is an amenable number.

921520202133101 is a deficient number, since it is larger than the sum of its proper divisors (1).

921520202133101 is an equidigital number, since it uses as much as digits as its factorization.

921520202133101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 921520202133101 in words is "nine hundred twenty-one trillion, five hundred twenty billion, two hundred two million, one hundred thirty-three thousand, one hundred one".