121012202261 has 2 divisors, whose sum is σ = 121012202262. Its totient is φ = 121012202260.

The previous prime is 121012202191. The next prime is 121012202321. The reversal of 121012202261 is 162202210121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104907323236 + 16104879025 = 323894^2 + 126905^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012202261 - 2²⁶ = 120945093397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121012205261) 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, 60506101130 + 60506101131.

It is an arithmetic number, because the mean of its divisors is an integer number (60506101131).

Almost surely, 2^121012202261 is an apocalyptic number.

It is an amenable number.

121012202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012202261 is an equidigital number, since it uses as much as digits as its factorization.

121012202261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121012202261 its reverse (162202210121), we get a palindrome (283214412382).

The spelling of 121012202261 in words is "one hundred twenty-one billion, twelve million, two hundred two thousand, two hundred sixty-one".