121701977 has 4 divisors (see below), whose sum is σ = 121874340. Its totient is φ = 121529616.

The previous prime is 121701967. The next prime is 121702003. The reversal of 121701977 is 779107121.

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 36675136 + 85026841 = 6056^2 + 9221^2 .

It is a cyclic number.

It is not a de Polignac number, because 121701977 - 2⁴ = 121701961 is a prime.

It is a super-2 number, since 2×121701977² = 29622742411417058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121701967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85118 + ... + 86535.

It is an arithmetic number, because the mean of its divisors is an integer number (30468585).

Almost surely, 2^121701977 is an apocalyptic number.

It is an amenable number.

121701977 is a deficient number, since it is larger than the sum of its proper divisors (172363).

121701977 is an equidigital number, since it uses as much as digits as its factorization.

121701977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172362.

The product of its (nonzero) digits is 6174, while the sum is 35.

The square root of 121701977 is about 11031.8619008760. The cubic root of 121701977 is about 495.5633853385.

The spelling of 121701977 in words is "one hundred twenty-one million, seven hundred one thousand, nine hundred seventy-seven".