121827477461 has 2 divisors, whose sum is σ = 121827477462. Its totient is φ = 121827477460.

The previous prime is 121827477403. The next prime is 121827477487. The reversal of 121827477461 is 164774728121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83989836100 + 37837641361 = 289810^2 + 194519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121827477461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121827477491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60913738730 + 60913738731.

It is an arithmetic number, because the mean of its divisors is an integer number (60913738731).

Almost surely, 2^121827477461 is an apocalyptic number.

It is an amenable number.

121827477461 is a deficient number, since it is larger than the sum of its proper divisors (1).

121827477461 is an equidigital number, since it uses as much as digits as its factorization.

121827477461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1053696, while the sum is 50.

The spelling of 121827477461 in words is "one hundred twenty-one billion, eight hundred twenty-seven million, four hundred seventy-seven thousand, four hundred sixty-one".