121221135463 has 2 divisors, whose sum is σ = 121221135464. Its totient is φ = 121221135462.

The previous prime is 121221135457. The next prime is 121221135467. The reversal of 121221135463 is 364531122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121221135463 - 2¹⁷ = 121221004391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221135467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610567731 + 60610567732.

It is an arithmetic number, because the mean of its divisors is an integer number (60610567732).

Almost surely, 2^121221135463 is an apocalyptic number.

121221135463 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221135463 is an equidigital number, since it uses as much as digits as its factorization.

121221135463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

Adding to 121221135463 its reverse (364531122121), we get a palindrome (485752257584).

The spelling of 121221135463 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thirty-five thousand, four hundred sixty-three".