921198101 has 2 divisors, whose sum is σ = 921198102. Its totient is φ = 921198100.

The previous prime is 921198037. The next prime is 921198119. The reversal of 921198101 is 101891129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661827076 + 259371025 = 25726^2 + 16105^2 .

It is a cyclic number.

It is not a de Polignac number, because 921198101 - 2⁶ = 921198037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921198121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460599050 + 460599051.

It is an arithmetic number, because the mean of its divisors is an integer number (460599051).

Almost surely, 2^921198101 is an apocalyptic number.

It is an amenable number.

921198101 is a deficient number, since it is larger than the sum of its proper divisors (1).

921198101 is an equidigital number, since it uses as much as digits as its factorization.

921198101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 921198101 is about 30351.2454604420. The cubic root of 921198101 is about 973.0108386022.

The spelling of 921198101 in words is "nine hundred twenty-one million, one hundred ninety-eight thousand, one hundred one".