121881767 has 6 divisors (see below), whose sum is σ = 141780888. Its totient is φ = 104470044.

The previous prime is 121881757. The next prime is 121881839. The reversal of 121881767 is 767188121.

It is not a de Polignac number, because 121881767 - 2⁶ = 121881703 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 (121881757) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1243643 + ... + 1243740.

It is an arithmetic number, because the mean of its divisors is an integer number (23630148).

Almost surely, 2^121881767 is an apocalyptic number.

121881767 is a deficient number, since it is larger than the sum of its proper divisors (19899121).

121881767 is an equidigital number, since it uses as much as digits as its factorization.

121881767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487397 (or 2487390 counting only the distinct ones).

The product of its digits is 37632, while the sum is 41.

The square root of 121881767 is about 11040.0075634032. The cubic root of 121881767 is about 495.8072967489.

The spelling of 121881767 in words is "one hundred twenty-one million, eight hundred eighty-one thousand, seven hundred sixty-seven".