121031300261 has 2 divisors, whose sum is σ = 121031300262. Its totient is φ = 121031300260.

The previous prime is 121031300197. The next prime is 121031300323. The reversal of 121031300261 is 162003130121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118949112100 + 2082188161 = 344890^2 + 45631^2 .

It is a cyclic number.

It is not a de Polignac number, because 121031300261 - 2⁶ = 121031300197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121031300561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60515650130 + 60515650131.

It is an arithmetic number, because the mean of its divisors is an integer number (60515650131).

Almost surely, 2^121031300261 is an apocalyptic number.

It is an amenable number.

121031300261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121031300261 is an equidigital number, since it uses as much as digits as its factorization.

121031300261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121031300261 its reverse (162003130121), we get a palindrome (283034430382).

The spelling of 121031300261 in words is "one hundred twenty-one billion, thirty-one million, three hundred thousand, two hundred sixty-one".