121621706761 has 8 divisors (see below), whose sum is σ = 122062888640. Its totient is φ = 121181141232.

The previous prime is 121621706749. The next prime is 121621706771. The reversal of 121621706761 is 167607126121.

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 121621706761 - 2⁵ = 121621706729 is a prime.

It is a super-2 number, since 2×121621706761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121621706771) 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, 243130 + ... + 549868.

It is an arithmetic number, because the mean of its divisors is an integer number (15257861080).

Almost surely, 2^121621706761 is an apocalyptic number.

It is an amenable number.

121621706761 is a deficient number, since it is larger than the sum of its proper divisors (441181879).

121621706761 is a wasteful number, since it uses less digits than its factorization.

121621706761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308175.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 121621706761 in words is "one hundred twenty-one billion, six hundred twenty-one million, seven hundred six thousand, seven hundred sixty-one".