121377261 has 32 divisors (see below), whose sum is σ = 173238912. Its totient is φ = 75479040.

The previous prime is 121377257. The next prime is 121377287. The reversal of 121377261 is 162773121.

It is not a de Polignac number, because 121377261 - 2² = 121377257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121377211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280101 + ... + 280533.

It is an arithmetic number, because the mean of its divisors is an integer number (5413716).

Almost surely, 2^121377261 is an apocalyptic number.

It is an amenable number.

121377261 is a deficient number, since it is larger than the sum of its proper divisors (51861651).

121377261 is a wasteful number, since it uses less digits than its factorization.

121377261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573.

The product of its digits is 3528, while the sum is 30.

The square root of 121377261 is about 11017.1348816287. The cubic root of 121377261 is about 495.1222512047.

The spelling of 121377261 in words is "one hundred twenty-one million, three hundred seventy-seven thousand, two hundred sixty-one".