121242771377 has 12 divisors (see below), whose sum is σ = 151886549556. Its totient is φ = 95928346080.

The previous prime is 121242771317. The next prime is 121242771439. The reversal of 121242771377 is 773177242121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27783555856 + 93459215521 = 166684^2 + 305711^2 .

It is not a de Polignac number, because 121242771377 - 2¹⁰ = 121242770353 is a prime.

It is a super-2 number, since 2×121242771377² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121242771317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95166374 + ... + 95167647.

It is an arithmetic number, because the mean of its divisors is an integer number (12657212463).

Almost surely, 2^121242771377 is an apocalyptic number.

It is an amenable number.

121242771377 is a deficient number, since it is larger than the sum of its proper divisors (30643778179).

121242771377 is a wasteful number, since it uses less digits than its factorization.

121242771377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190334048 (or 190334041 counting only the distinct ones).

The product of its digits is 230496, while the sum is 44.

The spelling of 121242771377 in words is "one hundred twenty-one billion, two hundred forty-two million, seven hundred seventy-one thousand, three hundred seventy-seven".