121212110977 has 2 divisors, whose sum is σ = 121212110978.
Its totient is φ = 121212110976.
The previous prime is 121212110947. The next prime is 121212110989. The reversal of 121212110977 is 779011212121.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 120458279041 + 753831936 = 347071^2 + 27456^2
It is a cyclic number.
It is not a de Polignac number, because 121212110977 - 27 = 121212110849 is a prime.
It is not a weakly prime, because it can be changed into another prime (121212110947) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606055488 + 60606055489.
It is an arithmetic number, because the mean of its divisors is an integer number (60606055489).
Almost surely, 2121212110977 is an apocalyptic number.
It is an amenable number.
121212110977 is a deficient number, since it is larger than the sum of its proper divisors (1).
121212110977 is an equidigital number, since it uses as much as digits as its factorization.
121212110977 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 3528, while the sum is 34.
The spelling of 121212110977 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred ten thousand, nine hundred seventy-seven".