121325345021 has 2 divisors, whose sum is σ = 121325345022. Its totient is φ = 121325345020.

The previous prime is 121325344969. The next prime is 121325345033. The reversal of 121325345021 is 120543523121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62106122521 + 59219222500 = 249211^2 + 243350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121325345021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121325345321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60662672510 + 60662672511.

It is an arithmetic number, because the mean of its divisors is an integer number (60662672511).

Almost surely, 2^121325345021 is an apocalyptic number.

It is an amenable number.

121325345021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121325345021 is an equidigital number, since it uses as much as digits as its factorization.

121325345021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 121325345021 its reverse (120543523121), we get a palindrome (241868868142).

The spelling of 121325345021 in words is "one hundred twenty-one billion, three hundred twenty-five million, three hundred forty-five thousand, twenty-one".