121446421 has 2 divisors, whose sum is σ = 121446422. Its totient is φ = 121446420.

The previous prime is 121446389. The next prime is 121446427. The reversal of 121446421 is 124644121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117288900 + 4157521 = 10830^2 + 2039^2 .

It is a cyclic number.

It is not a de Polignac number, because 121446421 - 2⁵ = 121446389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121446427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60723210 + 60723211.

It is an arithmetic number, because the mean of its divisors is an integer number (60723211).

Almost surely, 2^121446421 is an apocalyptic number.

It is an amenable number.

121446421 is a deficient number, since it is larger than the sum of its proper divisors (1).

121446421 is an equidigital number, since it uses as much as digits as its factorization.

121446421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 25.

The square root of 121446421 is about 11020.2731817319. The cubic root of 121446421 is about 495.2162725311.

The spelling of 121446421 in words is "one hundred twenty-one million, four hundred forty-six thousand, four hundred twenty-one".