193370388121 has 9 divisors (see below), whose sum is σ = 205422159999. Its totient is φ = 181988623584.

The previous prime is 193370388109. The next prime is 193370388139. The reversal of 193370388121 is 121883073391.

The square root of 193370388121 is 439739.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 150547880025 + 42822508096 = 388005^2 + 206936^2 .

It is not a de Polignac number, because 193370388121 - 2⁷ = 193370387993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193370388161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7462630 + ... + 7488496.

Almost surely, 2^193370388121 is an apocalyptic number.

193370388121 is the 439739-th square number.

193370388121 is the 219870-th centered octagonal number.

It is an amenable number.

193370388121 is a deficient number, since it is larger than the sum of its proper divisors (12051771878).

193370388121 is an frugal number, since it uses more digits than its factorization.

193370388121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51768 (or 25884 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 193370388121 in words is "one hundred ninety-three billion, three hundred seventy million, three hundred eighty-eight thousand, one hundred twenty-one".