121771573745 has 8 divisors (see below), whose sum is σ = 146192962560. Its totient is φ = 97372542960.

The previous prime is 121771573741. The next prime is 121771573783. The reversal of 121771573745 is 547375177121.

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

It is not a de Polignac number, because 121771573745 - 2² = 121771573741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121771573693 and 121771573702.

It is not an unprimeable number, because it can be changed into a prime (121771573741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5577521 + ... + 5599310.

It is an arithmetic number, because the mean of its divisors is an integer number (18274120320).

Almost surely, 2^121771573745 is an apocalyptic number.

It is an amenable number.

121771573745 is a deficient number, since it is larger than the sum of its proper divisors (24421388815).

121771573745 is a wasteful number, since it uses less digits than its factorization.

121771573745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179015.

The product of its digits is 1440600, while the sum is 50.

The spelling of 121771573745 in words is "one hundred twenty-one billion, seven hundred seventy-one million, five hundred seventy-three thousand, seven hundred forty-five".