121051549 has 2 divisors, whose sum is σ = 121051550. Its totient is φ = 121051548.

The previous prime is 121051547. The next prime is 121051607. The reversal of 121051549 is 945150121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120340900 + 710649 = 10970^2 + 843^2 .

It is a cyclic number.

It is not a de Polignac number, because 121051549 - 2¹ = 121051547 is a prime.

Together with 121051547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121051547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60525774 + 60525775.

It is an arithmetic number, because the mean of its divisors is an integer number (60525775).

Almost surely, 2^121051549 is an apocalyptic number.

It is an amenable number.

121051549 is a deficient number, since it is larger than the sum of its proper divisors (1).

121051549 is an equidigital number, since it uses as much as digits as its factorization.

121051549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 121051549 is about 11002.3428868582. The cubic root of 121051549 is about 494.6789728821.

The spelling of 121051549 in words is "one hundred twenty-one million, fifty-one thousand, five hundred forty-nine".