121450661 has 2 divisors, whose sum is σ = 121450662. Its totient is φ = 121450660.

The previous prime is 121450657. The next prime is 121450673. The reversal of 121450661 is 166054121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105966436 + 15484225 = 10294^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 121450661 - 2² = 121450657 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121450661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121450621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60725330 + 60725331.

It is an arithmetic number, because the mean of its divisors is an integer number (60725331).

Almost surely, 2^121450661 is an apocalyptic number.

It is an amenable number.

121450661 is a deficient number, since it is larger than the sum of its proper divisors (1).

121450661 is an equidigital number, since it uses as much as digits as its factorization.

121450661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 121450661 is about 11020.4655527795. The cubic root of 121450661 is about 495.2220355459. Note that the first 3 decimals are identical.

The spelling of 121450661 in words is "one hundred twenty-one million, four hundred fifty thousand, six hundred sixty-one".