121571717045 has 8 divisors (see below), whose sum is σ = 146692061880. Its totient is φ = 96720039360.

The previous prime is 121571716969. The next prime is 121571717063. The reversal of 121571717045 is 540717175121.

It can be written as a sum of positive squares in 4 ways, for example, as 1111355569 + 120460361476 = 33337^2 + 347074^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121571717045 - 2³² = 117276749749 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121571716993 and 121571717011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67165790 + ... + 67167599.

It is an arithmetic number, because the mean of its divisors is an integer number (18336507735).

Almost surely, 2^121571717045 is an apocalyptic number.

It is an amenable number.

121571717045 is a deficient number, since it is larger than the sum of its proper divisors (25120344835).

121571717045 is a wasteful number, since it uses less digits than its factorization.

121571717045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134333575.

The product of its (nonzero) digits is 68600, while the sum is 41.

The spelling of 121571717045 in words is "one hundred twenty-one billion, five hundred seventy-one million, seven hundred seventeen thousand, forty-five".