121765476541 has 2 divisors, whose sum is σ = 121765476542. Its totient is φ = 121765476540.

The previous prime is 121765476419. The next prime is 121765476577. The reversal of 121765476541 is 145674567121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75215256516 + 46550220025 = 274254^2 + 215755^2 .

It is a cyclic number.

It is not a de Polignac number, because 121765476541 - 2²⁹ = 121228605629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121765473541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60882738270 + 60882738271.

It is an arithmetic number, because the mean of its divisors is an integer number (60882738271).

Almost surely, 2^121765476541 is an apocalyptic number.

It is an amenable number.

121765476541 is a deficient number, since it is larger than the sum of its proper divisors (1).

121765476541 is an equidigital number, since it uses as much as digits as its factorization.

121765476541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 49.

The spelling of 121765476541 in words is "one hundred twenty-one billion, seven hundred sixty-five million, four hundred seventy-six thousand, five hundred forty-one".