73029117121 has 3 divisors (see below), whose sum is σ = 73029387361. Its totient is φ = 73028846882.

The previous prime is 73029117107. The next prime is 73029117143. The reversal of 73029117121 is 12171192037.

The square root of 73029117121 is 270239.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 73029117121 - 2²⁷ = 72894899393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73029127121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 135120 + ... + 405358.

Almost surely, 2^73029117121 is an apocalyptic number.

73029117121 is the 270239-th square number.

73029117121 is the 135120-th centered octagonal number.

It is an amenable number.

73029117121 is a deficient number, since it is larger than the sum of its proper divisors (270240).

73029117121 is an frugal number, since it uses more digits than its factorization.

73029117121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540478 (or 270239 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 34.

The spelling of 73029117121 in words is "seventy-three billion, twenty-nine million, one hundred seventeen thousand, one hundred twenty-one".