193021121 has 2 divisors, whose sum is σ = 193021122. Its totient is φ = 193021120.

The previous prime is 193021093. The next prime is 193021139. The reversal of 193021121 is 121120391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183900721 + 9120400 = 13561^2 + 3020^2 .

It is a cyclic number.

It is not a de Polignac number, because 193021121 - 2¹⁴ = 193004737 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 193021093 and 193021102.

It is not a weakly prime, because it can be changed into another prime (193021181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96510560 + 96510561.

It is an arithmetic number, because the mean of its divisors is an integer number (96510561).

Almost surely, 2^193021121 is an apocalyptic number.

It is an amenable number.

193021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

193021121 is an equidigital number, since it uses as much as digits as its factorization.

193021121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 193021121 is about 13893.2041300774. The cubic root of 193021121 is about 577.9207366075.

The spelling of 193021121 in words is "one hundred ninety-three million, twenty-one thousand, one hundred twenty-one".