121710881 has 4 divisors (see below), whose sum is σ = 121733652. Its totient is φ = 121688112.

The previous prime is 121710859. The next prime is 121710887. The reversal of 121710881 is 188017121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90250000 + 31460881 = 9500^2 + 5609^2 .

It is a cyclic number.

It is not a de Polignac number, because 121710881 - 2¹⁸ = 121448737 is a prime.

It is a super-2 number, since 2×121710881² = 29627077107592322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121710887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (30433413).

Almost surely, 2^121710881 is an apocalyptic number.

It is an amenable number.

121710881 is a deficient number, since it is larger than the sum of its proper divisors (22771).

121710881 is an equidigital number, since it uses as much as digits as its factorization.

121710881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22770.

The product of its (nonzero) digits is 896, while the sum is 29.

The square root of 121710881 is about 11032.2654518462. The cubic root of 121710881 is about 495.5754705674.

The spelling of 121710881 in words is "one hundred twenty-one million, seven hundred ten thousand, eight hundred eighty-one".