121503020461 has 2 divisors, whose sum is σ = 121503020462. Its totient is φ = 121503020460.

The previous prime is 121503020417. The next prime is 121503020467. The reversal of 121503020461 is 164020305121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119902220361 + 1600800100 = 346269^2 + 40010^2 .

It is a cyclic number.

It is not a de Polignac number, because 121503020461 - 2¹³ = 121503012269 is a prime.

It is a super-2 number, since 2×121503020461² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121503020467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60751510230 + 60751510231.

It is an arithmetic number, because the mean of its divisors is an integer number (60751510231).

Almost surely, 2^121503020461 is an apocalyptic number.

It is an amenable number.

121503020461 is a deficient number, since it is larger than the sum of its proper divisors (1).

121503020461 is an equidigital number, since it uses as much as digits as its factorization.

121503020461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 121503020461 its reverse (164020305121), we get a palindrome (285523325582).

The spelling of 121503020461 in words is "one hundred twenty-one billion, five hundred three million, twenty thousand, four hundred sixty-one".