121751671641 has 16 divisors (see below), whose sum is σ = 162993254400. Its totient is φ = 80839036928.

The previous prime is 121751671627. The next prime is 121751671651. The reversal of 121751671641 is 146176157121.

It is a cyclic number.

It is not a de Polignac number, because 121751671641 - 2⁵ = 121751671609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121751671593 and 121751671602.

It is not an unprimeable number, because it can be changed into a prime (121751671651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8874295 + ... + 8888003.

It is an arithmetic number, because the mean of its divisors is an integer number (10187078400).

Almost surely, 2^121751671641 is an apocalyptic number.

It is an amenable number.

121751671641 is a deficient number, since it is larger than the sum of its proper divisors (41241582759).

121751671641 is a wasteful number, since it uses less digits than its factorization.

121751671641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25488.

The product of its digits is 70560, while the sum is 42.

The spelling of 121751671641 in words is "one hundred twenty-one billion, seven hundred fifty-one million, six hundred seventy-one thousand, six hundred forty-one".