121711477 has 2 divisors, whose sum is σ = 121711478. Its totient is φ = 121711476.

The previous prime is 121711453. The next prime is 121711481. The reversal of 121711477 is 774117121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83283876 + 38427601 = 9126^2 + 6199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121711477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121718477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60855738 + 60855739.

It is an arithmetic number, because the mean of its divisors is an integer number (60855739).

Almost surely, 2^121711477 is an apocalyptic number.

It is an amenable number.

121711477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121711477 is an equidigital number, since it uses as much as digits as its factorization.

121711477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2744, while the sum is 31.

The square root of 121711477 is about 11032.2924634910. The cubic root of 121711477 is about 495.5762794858.

Adding to 121711477 its reverse (774117121), we get a palindrome (895828598).

The spelling of 121711477 in words is "one hundred twenty-one million, seven hundred eleven thousand, four hundred seventy-seven".