121956763261 has 8 divisors (see below), whose sum is σ = 125701918848. Its totient is φ = 118267926000.

The previous prime is 121956763217. The next prime is 121956763273. The reversal of 121956763261 is 162367659121.

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

It is a cyclic number.

It is not a de Polignac number, because 121956763261 - 2³³ = 113366828669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121956763961) 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, 14075185 + ... + 14083846.

It is an arithmetic number, because the mean of its divisors is an integer number (15712739856).

Almost surely, 2^121956763261 is an apocalyptic number.

It is an amenable number.

121956763261 is a deficient number, since it is larger than the sum of its proper divisors (3745155587).

121956763261 is an equidigital number, since it uses as much as digits as its factorization.

121956763261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28159163.

The product of its digits is 816480, while the sum is 49.

The spelling of 121956763261 in words is "one hundred twenty-one billion, nine hundred fifty-six million, seven hundred sixty-three thousand, two hundred sixty-one".