121636741 has 2 divisors, whose sum is σ = 121636742. Its totient is φ = 121636740.

The previous prime is 121636733. The next prime is 121636747. The reversal of 121636741 is 147636121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103103716 + 18533025 = 10154^2 + 4305^2 .

It is a cyclic number.

It is not a de Polignac number, because 121636741 - 2³ = 121636733 is a prime.

It is a super-2 number, since 2×121636741² = 29590993522202162, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121636747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60818370 + 60818371.

It is an arithmetic number, because the mean of its divisors is an integer number (60818371).

Almost surely, 2^121636741 is an apocalyptic number.

It is an amenable number.

121636741 is a deficient number, since it is larger than the sum of its proper divisors (1).

121636741 is an equidigital number, since it uses as much as digits as its factorization.

121636741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 121636741 is about 11028.9047960348. The cubic root of 121636741 is about 495.4748237777.

The spelling of 121636741 in words is "one hundred twenty-one million, six hundred thirty-six thousand, seven hundred forty-one".